CN117717660A - Medical catheter capable of eliminating blockage - Google Patents
Medical catheter capable of eliminating blockage Download PDFInfo
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- CN117717660A CN117717660A CN202410121663.2A CN202410121663A CN117717660A CN 117717660 A CN117717660 A CN 117717660A CN 202410121663 A CN202410121663 A CN 202410121663A CN 117717660 A CN117717660 A CN 117717660A
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Abstract
A medical catheter with elimination of obstruction, there are fluid inlet (101) and fluid outlet (102) communicated with lumen (10) of the catheter, in the lumen (10) of the catheter adjacent to fluid inlet (101) the associated area, there are elastic body (2) of the bag or non-bag type that can displace after being pressed by fluid elastic body (p 2), and the disfigurement body (3) driven by elastic body; the destroying body (3) can be driven by the expanded elastic body free part (22) to displace, the expansion deformation of the elastic body free part (22) can drive the destroying component (33) to move at the fluid inlet (101), blood clots (M) or other tissue lumps blocked at the fluid inlet (101) are broken through repeated cutting and/or puncturing actions, the broken part (M1) is obviously reduced in external size and cannot continuously block the fluid inlet (101), and the blood clots are more easily discharged out of the body through the catheter inner cavity (10).
Description
Technical Field
The invention relates to a medical catheter for eliminating obstruction, belonging to the technical field of medical instruments.
Background
Various medical catheters are the most common medical instruments in clinic, and are used for entering natural cavity passages, third gaps and other parts of human bodies; medical catheters for drainage functions, such as medical catheters placed from the urethra, drain urine from the bladder to the outside of the body; can be taken out after one-time urine drainage, and also can be reserved for a long time for multiple urine drainage.
The problem of poor drainage during the use or retention of various medical catheters is generally called catheter blockage, which is clinically understood to be blockage of the inner cavity of the catheter, but is essentially blockage of the fluid inlet of the catheter; when a common catheter is blocked and dredged, a guide wire is used for dredging the inner cavity of the catheter, but the effect is poor; the other way of dredging the catheter is negative pressure suction, and the common injector repeatedly sucks or flushes water, so that the method has certain effect, but is not helpful when the fluid inlet of the catheter is completely blocked by larger blood clots or other tissue masses, when the blockage cannot be eliminated, the catheter is required to be pulled out, and then the catheter with larger inner diameter is replaced and is put in again, so that great pain is brought to a patient; if the tissue blocks such as blood clots are not removed in time, the tissue blocks can be used as a culture medium for pathogenic microorganisms, so that the infection risk is increased.
Disclosure of Invention
The invention is used for effectively removing pathological tissue masses such as hematoma and blood clot in the body and ensuring the smooth drainage of the catheter during the use of the medical catheter.
The purpose of the invention is realized in the following way:
the medical catheter with elimination of obstruction consists of hollow catheter body comprising head, middle and tail, fluid inlet in the head and fluid outlet in the tail, and features that there are elastic or non-elastic bag body and elastic body driven by the elastic body; the elastic body comprises an elastic body connecting part and an elastic body free part, wherein the elastic body connecting part is directly or indirectly connected with the inner surface of the catheter wall in a sealing way, and the inner cavity of the elastic body is in fluid communication with an elastic body passage arranged on the catheter wall through a communication hole; the distal end of the balloon elastomer free portion faces the fluid inlet or the fluid inlet proximal space; the damaged body can be driven by the expanded free part of the elastic body to displace, the connecting end of the damaged body is directly or indirectly contacted with the free part of the elastic body, the free end of the damaged body is provided with a sharp damaged component, and the expansion deformation of the free part of the elastic body can drive the damaged component to move at the fluid inlet, so that blood clots or other tissue aggregates blocked at the fluid inlet can be broken through repeated cutting and/or puncturing actions, the broken part can not continuously block the fluid inlet due to the obvious reduction of the external size, and the blood clots or other tissue aggregates can be more easily discharged out of the body through the inner cavity of the catheter.
The catheter lumen is adjacent to the associated region of the fluid inlet, which region comprises two spatial structures, one of which is a fluid inlet upper space formed by continuing to extend above the fluid inlet, and the other of which is a fluid inlet adjacent space adjacent to the fluid inlet, and the cystic elastic body can be partially or completely accommodated in the two spaces; the space adjacent to the fluid inlet is a space which is necessary to exist in terms of drainage effect, and the space above the fluid inlet can be omitted, but the concept that the space above the fluid inlet partially or completely accommodates non-cystic elastic body or cystic elastic body can lead the space adjacent to the fluid inlet not to be occupied continuously, thereby facilitating drainage liquid such as urine, gastric juice and other fluids to enter the inner cavity of the catheter more easily; the elastic body is in a capsule shape, has an inner cavity, can expand and deform to output similar elasticity after filling, can be made of compliant materials such as silicone rubber, thermoplastic elastomer and the like, has elasticity, and has certain capacity of actively restoring a restoring state after filling, namely, after releasing the fluid pressure in the inner cavity of the elastic body, the shape of the elastic body can be restored autonomously, and can be restored completely or to a certain extent; the elastic body of the bag type elastic body can not have elasticity, and is made of non-compliant materials such as block polyether amide, polyamide and the like, and the filling deformation and shape recovery are all dependent on the change of the fluid pressure in the inner cavity of the elastic body of the bag type elastic body; the upper space of the fluid inlet is communicated with the adjacent space of the fluid inlet, at least most of the elastic body is positioned in the upper space of the fluid inlet before filling and expanding, and the far-end point of the free part of the elastic body moves to be close to or enter the adjacent space of the fluid inlet after expanding; according to different structures of the cystic elastic body, the far end point of the free part of the cystic elastic body can move downwards along the axis after expansion and can also move in a deflection way at a certain angle with the axis; the free end of the damaged body is provided with a sharp damaged member, and the part of the damaged body which is not in direct contact with the free part of the cystic elastic body is provided with a sharp damaged member so as to avoid damaging the cystic elastic body; the damage component is far away from the cystic elastic body, and the free part of the cystic elastic body is not damaged by the damage component even if the free part of the cystic elastic body expands and deforms to the limit; the inner cavity of the cystic elastic body is in fluid communication with a cystic elastic body passage arranged on the wall of the catheter through a communication hole, and the communication hole can be directly arranged on the inner surface of the top end part of the head part of the catheter or on the inner surface of the wall of the catheter; the catheter head is closed by a top end part, an inner passage of the top end part is connected with the cystic elastic body passage, the top end part can be an independent part and is connected with the top end of the catheter head in a sealing way, and the top end part can also be integrally formed with the part below the top end of the catheter head; the top part of the structure mainly plays a role of sealing the top end surface of the head part of the catheter, no internal passage is arranged on the top part, and the communication hole is directly arranged on the inner surface of the catheter wall; the other structure is that the top end part is internally provided with a hollow protruding part which is completely or partially wrapped by the cystic elastic body, and the opening of the protruding part facing the inner cavity of the cystic elastic body is a communicating hole of the inner cavity of the cystic elastic body; the cystic elastic body connecting part can be in circumferential sealing connection with the initial area of the top end part protruding part; the non-cystic elastic body is characterized by being non-cystic, the fluid can directly press the free part of the non-cystic elastic body to deform and displace, and the non-cystic elastic body can be made of flexible or elastic materials.
To adapt to different clinical demands, the shape of the damage component is one or a combination of more of sharp spike shape, hook shape, sickle shape, blade shape, tooth shape and anchor shape; the moving destructive element is directed towards the fluid inlet, preferably into or through the fluid inlet interior space, which is the area of space between the inner and outer edge lines of the fluid inlet, where blood clots or the like that normally block the fluid inlet will largely fill this space; the destroying component repeatedly enters and surpasses the inner space of the fluid inlet, namely, the destroying component moves to a position beyond the outer edge line, so that tissue blocks such as blood clots and the like can be destroyed more actively and mechanically.
Further, the free part of the cystic elastic body is in the form of one or more of bellows type, eccentric type, forked at the far end point, local thin wall type at the far end point, through hole type at the far end point, wall attaching type and suspended type; the bellows type is at least a region close to the connecting part of the cystic elastic body, is designed into a bellows shape, and after the fluid in the inner cavity of the cystic elastic body is filled, the bellows extends partially without increasing or obviously increasing the outer diameter, and can not generate obvious friction with the inner surface of the tube wall to not influence the movement of a damaged body; the eccentric type elastic body free part refers to the eccentric of the free part which forms a certain angle with the central axis of the inner cavity of the catheter before or after expansion, and the free part after the eccentric drives a sharp damage component on the free end of the damage body to more easily reciprocate in the inner space of the fluid inlet, so that the tissue masses such as blood clots and the like positioned in and outside the space are accurately crushed and damaged; when the catheter is provided with two or more fluid inlets, the free part of the cystic elastic body is in a bifurcation shape at the far end point, and each bifurcation can correspond to one fluid inlet, so that the blockage at each fluid inlet is ensured to be eliminated accurately; the free part of the cystic elastic body is locally thin-walled at the far end point, the far end of the free part of the cystic elastic body is larger in deformation displacement amplitude under the same filling pressure, and the specific positions of each filling and restoring pass are different, so that the damage component can be driven to fully act at each corner; the through hole at the far end point can be connected with the damaged body in a sealing way through the through hole, namely the connecting part of the damaged body passes through the through hole and is connected with the free part of the cystic elastic body into a whole, so that the damaged body can be driven to displace better; the wall-attached type elastic body free part can fully utilize the upper space of the fluid inlet, so that the position of the elastic body free part before filling is more stable, and the elastic body free part after filling can be deformed more accurately in a preset direction; the free portion of the elastic body is suspended, particularly in the space adjacent to the fluid inlet, so that the damaged member can be more easily contacted with the tissue mass blocking the fluid inlet after the elastic body is inflated.
An optimized scheme is that the free part of the cystic elastic body consists of a corrugated pipe section and a smooth section, the smooth section is positioned at the far end, and a damaged body is sleeved outside the smooth section; before the free part of the elastic body is inflated, the smooth section and the damaged body on the smooth section partially or not partially extend into the space adjacent to the fluid inlet; the corrugated pipe section is designed into a corrugated shape in the area close to the connecting part of the cystic elastic body, the corrugated pipe section extends without increasing or obviously increasing the outer diameter after the fluid in the inner cavity of the cystic elastic body is filled, obvious friction with the inner surface of the pipe wall is avoided, the movement of a damaged body is not influenced, and the smooth section can deform to a greater extent after being expanded so as to drive the damaged body to move; a preferred detail is that the bellows section has a greater wall thickness than the smooth section, with the same filling pressure resulting in a reduced radial expansion of the bellows section and a greater expansion of the smooth section; as another solution under the same concept, the destructive element, in particular in the form of a blade, can be directly attached to the free portion of the cystic elastic body, preferably by probing the fluid inlet adjacent to the space, and cutting the tissue mass directly after expansion.
In order to ensure the stability of the non-cystic elastic body and the cystic elastic body during deformation displacement, a thin-wall sleeve with a completely open top or a partially closed top is nested in at least the upper space of the fluid inlet, and all or part of the free part of the cystic elastic body is positioned in the inner cavity of the sleeve which is communicated with the adjacent space of the fluid inlet; the fluid inlet may also be provided on the sleeve.
The sleeve with the hard thin wall is embedded into the flexible catheter, so that the damage of the damaged components and the like caused by extrusion of the catheter can be avoided, and the accidental damage of the damaged components to normal tissues can be avoided; the sleeve can be made of thin-wall metal materials such as stainless steel, and the inner surface of the sleeve is smoothly provided or is added with lubricating substances to reduce friction resistance; the fully open thin-wall sleeve means that the opening above the sleeve is equal to or nearly equal to the inner diameter of the sleeve, and the upper end surface of the sleeve faces towards or abuts against the inner surface of the top end part of the catheter head; the sleeve top part is partially closed, namely, the sleeve towards one side of the inner surface of the top end part of the catheter head part is provided with a sleeve top part which is formed by partially closing an opening at the upper part of the sleeve, the sleeve top part can increase the structural strength of the sleeve, and meanwhile, the sleeve top part is provided with a passage and an opening which can fill fluid into the inner cavity of the cystic elastic body; as a variant of the same concept, hollow protrusions may also be provided on the side wall of the sleeve, preferably at an angle to the axis, directed towards the fluid inlet, in a spatial view; the sleeve can be completely attached to the inner surface of the pipe wall forming the upper space of the fluid inlet, the inner cavity of the sleeve in this case becomes the arrangement of the upper space of the fluid inlet, and the sleeve can be partially embedded into the upper space of the fluid inlet; the sleeve and the adjacent conduit wall are integrally molded or formed, and can be made of metal and medical polymer materials, so that independent sleeve components are omitted.
In order to improve the transmission efficiency, the free part of the cystic elastic body is in power fit with the damaged body directly or through a disc-shaped intermediate body; the disk-shaped intermediate body is provided with an upward skirt and/or a downward skirt, and the outer surface of the disk-shaped intermediate body skirt is in sliding contact with the inner surface of the upper space of the fluid inlet.
The power fit means that the damage body can be driven to displace or deform dynamically when the free part of the cystic elastic body expands and deforms, so that the damage component can contact and damage tissue masses such as blood clots and the like at the fluid inlet; when the upper space of the fluid inlet is nested with the thin-wall sleeve, the outer surface of the skirt edge of the disc-shaped intermediate body is in sliding contact with the inner surface of the smooth sleeve; the disc-shaped intermediate body plays a role in guiding the piston movement, and the free part of the cystic elastic body expands and deforms to enable the thrust transmission function, the thrust amplification function and the limit and lubrication function of the skirt when the far end moves downwards, and can be made of self-lubricating materials or smeared with lubricating substances on the surface of the skirt; in order to reduce the weight, the disc-shaped intermediate body can be hollowed out.
In order to facilitate the on-site operation of a doctor, the medical catheter also comprises a hollow power body which is sleeved at the tail part of the medical catheter in a saccular way or is connected with a side branch of a saccular elastic body passage at the tail part of the medical catheter, and an inner cavity of the power body is communicated with the saccular elastic body passage; after being pressed, the fluid in the power body cavity enters the cystic elastic body cavity directly or through the bridging tube through the cystic elastic body passage.
The power body is preferably made of self-elastic materials, after being pressed, gas or liquid in the inner cavity of the power body can be injected into the inner cavity of the cystic elastic body through the outer opening of the passageway of the cystic elastic body and the passageway of the cystic elastic body, so that the cystic elastic body is free to expand and deform to drive the damaged body to displace, the damaged member is contacted with and damage the tissue mass, after the pressure on the power body is relieved, the power body is self-restored due to elasticity, the fluid entering the free part of the cystic elastic body is pumped back, the free part of the cystic elastic body is connected with the damaged body and the damaged member on the damaged body, and the like can be continuously damaged until the blockage of the fluid inlet is relieved by taking the manual mode of an operator as an example, the degree of each pressing of the power body is different, so that the expansion degree of the free part of the cystic elastic body is different, the action positions of the damaged body and the damaged member on the damaged body are different; the power body can be a saccular power body or a syringe-like piston power body; the side branch of the path of the cystic elastic body can be arranged at the tail part of the medical catheter, and fluid is injected into the inner cavity of the cystic elastic body through the external opening of the path of the cystic elastic body.
In order to meet different clinical scenes, the damaged body outside the free part of the cystic elastic body is in one or more forms of an adherence outer sleeve type, an adherence inner sleeve type and a non-adherence type.
Preferably, the free part of the elastic body and the damaged body on the free part of the elastic body partially or completely extend into the fluid inlet adjacent space of the inner cavity of the catheter before the free part of the elastic body expands, and the damaged body with smaller volume partially or completely extends into the fluid inlet adjacent space before the action so that the damaged body is more easily contacted with tissue masses such as blood clots blocked at the fluid inlet when the damaged body is driven to displace by the elastic body; the main body of the damaged body is an adherent coat type, namely a part of the damaged body is coated on the outer surface of the catheter wall and is in close contact with or adjacent to the outer surface of the catheter wall, and the peripheral coat of the part of the coat can also be partially coated; the wall-attached inner sleeve type is that at least one part of the damaged body is closely contacted or adjacent to the inner surface of the conduit wall or a nested thin-wall part on the inner surface; the damaged body clings to the outer sleeve type structure and the clings to the inner sleeve type structure to play a role in positioning, guiding and saving space aiming at the relative movement of the fluid inlet; the non-adherent type is that the damaged body is in a hanging state directly or indirectly connected with the free part of the cystic elastic body, the guiding function matched with the catheter wall is not fully exerted, but the degree of freedom is larger, the space adjacent to the fluid inlet can be fully utilized, the outer diameter of the catheter is not increased, the corresponding form can be selected according to different clinical applications, such as abdominal cavity, thoracic cavity and bladder internal drainage with larger space, and the damaged body adherent coat type is selected; the leading-out of intracranial hematoma is more suitable for adhering to the inner sleeve because the brain tissue is prevented from being damaged; the drainage space in the brain room is smaller and can be selected to be non-adherent.
The conduit may be provided with one or more fluid inlets configured to: the wall thickness is less than 50% of the average thickness of the conduit wall, the fluid inlets are distributed radially, the edges of the fluid inlets are in a zigzag shape, and one or more of the protective sheets are arranged in the conduit cavity of the fluid inlet.
Compared with the method that a fluid inlet is directly formed in the wall of the conduit, the thin-wall fluid inlet, particularly the thin-wall fluid inlet with the thickness being less than 50% of the average thickness of the wall of the conduit, shortens the distance between the inner edge line and the outer edge line, reduces the contact area between blood clots and the fluid inlet, and leads the blood clots to pass through the fluid inlet more easily; the special manufacturing can be partially molded in a thin wall, and a thin-wall inlet part can also be used.
The radian of the fluid inlet distributed in the radial direction is increased compared with that of the fluid inlet distributed in the radial direction, so that blood clots are easier to be detected into the space adjacent to the fluid inlet when the negative pressure is started; the edge of the fluid inlet is in a zigzag shape, preferably in a zigzag shape with high and low fluctuation, and even if the fluid inlet is covered by blood clots, water can flow in a plurality of zigzag line gaps; the inner cavity of the catheter below the fluid inlet is embedded with a protective sheet to limit the stroke of the damaged component and protect the soft catheter wall from being damaged by the sharp damaged component.
Further, the device also comprises a booster body which helps the position of the cystic elastic body to fully recover after the cystic elastic body is released from expansion, wherein the booster body is one or more of tension springs and compression springs with different shapes, and the booster body directly or indirectly acts on the cystic elastic body and/or the damaged body.
A booster body can be arranged in the upper space of the fluid inlet, and the free part of the cystic elastic body after boosting expansion is quickly restored to the original state; the other booster body can also be arranged at the tail part outside the user catheter body to act on the power body, so that the inner cavity of the booster power body is reduced and restored, and the efficiency of filling, expanding and releasing the expansion of the free part of the cystic elastic body is improved, namely, the damage efficiency of the damaged components on the damaged body to the tissue masses such as blood clots blocking the fluid inlet is directly improved.
For better removal of the broken tissue mass, one or more irrigation passages provided along the catheter wall are also included, which irrigation passages communicate with the fluid inlet headspace and/or the fluid inlet proximal space through the irrigation holes.
The flushing passage can be communicated with a flushing side branch passage arranged at the tail part of the catheter, flushing fluid enters the flushing side branch passage through an outer opening of the flushing side branch passage, the flushing passage flowing through the pipe wall enters the upper space of the fluid inlet and/or the space adjacent to the fluid inlet through a flushing hole, and one or more flushing holes can be arranged, and the flushing hole can also be arranged in the inner space of the fluid inlet; the flushing passage aims at combining the water flow impact, anti-adhesion, scrubbing action and the damage action of the damage component on the tissue mass such as blood clot and the like, and rapidly cleaning a large number of broken parts of the tissue mass outside the body under the assistance of the suction of the negative pressure in the inner cavity of the catheter.
In order to facilitate the field operation, the catheter also comprises a negative pressure bag with elastic restoring force, and the cavity of the negative pressure bag is communicated with the cavity of the catheter.
The volume of the inner cavity of the negative pressure bag is reduced after the negative pressure bag is pressed, and the elastic restoring force of the negative pressure bag generates negative pressure and acts on the inner cavity of the catheter, so that tissue lumps such as blood clots blocked at the fluid inlet are attracted to move towards the inner cavity of the catheter, even tiny movement is helpful for damaging the components to be more easily contacted with the tissue lumps and fully damaged, and the tissue lumps are prevented from returning to the human body cavity; the size of the negative pressure bag is convenient for an operator to grasp; the negative pressure bag can be assembled on a negative pressure bag side branch connected with the tail part of the catheter, a negative pressure bag side branch passage is communicated with the inner cavity of the negative pressure bag, and a large amount of broken parts of the tissue mass are discharged out of the body through an outer opening of the negative pressure bag side branch passage; the opening in the negative pressure sac side branch passage is communicated with the inner cavity of the catheter; when in use, the fluid outlet of the conduit can be closed by clamping the pipeline and the like.
Further, the saccular power body is adjacent to or integrally fused with the negative pressure saccule, so that one-hand operation is facilitated; the volume of the negative pressure bag is larger than that of the saccular power body; the integrated fusion means that at least the main body part of the negative pressure bag and the main body part of the bag-shaped power body are integrally formed, namely, the integrated power body is composed of the same material with continuous structure, the cost is lower, the production efficiency is higher, and the check valve in the integrated power body is additionally assembled.
The hollow catheter body is composed of a catheter head part, a middle part and a tail part which are connected into a whole, the catheter head part is provided with a fluid inlet, the tail part is provided with a fluid outlet, the fluid inlet and the fluid outlet are communicated with the inner cavity of the catheter, an elastomer which is easy to deform after being pulled is arranged in the area adjacent to the fluid inlet of the inner cavity of the catheter, namely, the upper space of the fluid inlet and/or the adjacent space of the fluid inlet, and the elastomer connecting part is fixed in the upper space of the fluid inlet and/or the adjacent space of the fluid inlet; the device also comprises a damaged body and a traction body, wherein the damaged body can be driven by the free part of the elastic body to displace, the connecting end of the damaged body is directly or indirectly contacted with the free part of the elastic body, the free end of the damaged body is provided with a sharp damaged member, and the damaged body is in one or more of an adherence outer sleeve type, an adherence inner sleeve type and a non-adherence type; the traction body is in a fine line shape, one end of the traction body is directly or indirectly connected with the free part of the elastic body, the other end of the traction body is positioned outside the inner cavity of the catheter, the free part of the elastic body can be deformed by pulling the traction body, so that the damage component is driven to move at the fluid inlet, blood clots or other types of tissue masses blocked at the fluid inlet are broken, the broken part is obviously reduced in external size and can not continuously block the fluid inlet, and the blood clots or other types of tissue masses are more easily discharged out of the body through the inner cavity of the catheter.
In order to enhance the damage effect, the traction body is connected with a synchronous damage body at the position of the fluid inlet adjacent to the space, the connecting part of the synchronous damage body is tightly connected with the traction body, the free part of the thin-wall synchronous damage body is horizontally extended in a hollowed-out mode, a damage component is arranged below the free part of the synchronous damage body, and the damage component can be driven by the traction body to move up and down to cut and damage tissue masses such as blood clots and the like in the space adjacent to the fluid inlet and/or the inner space of the fluid inlet.
In coordination with operation of the traction body to drive the elastomer, further comprising one or more of a flushing path, a thin-walled fluid inlet, a sleeve, a negative pressure bladder; a flushing passage provided on the conduit wall communicates with the fluid inlet upper space and/or the fluid inlet adjacent space through a flushing hole; the wall thickness at the thin-walled fluid inlet is less than 50% of the average thickness of the conduit wall; the upper space of the fluid inlet is nested with a thin-wall sleeve with a completely open top or a partially closed top, and all or part of the elastomer free part is positioned in the inner cavity of the sleeve which is communicated with the adjacent space of the fluid inlet; the negative pressure bag has elastic restoring force, and the cavity of the negative pressure bag is communicated with the cavity of the catheter.
The traction body is penetrated out of the opening of the traction body side branch passage and is connected with a handle; in order to prevent the liquid from overflowing through the opening of the traction body side branch passage, a hollow sealing body is arranged in the traction body side branch passage or a flexible sac is arranged between the handle and the traction body side branch.
The traction body is in contact with the sealing body in a sealing state for preventing liquid from passing through; the inner cavity of the flexible bag is isolated outwards to seal the side branch passage opening of the traction body in the inner cavity of the flexible bag, the flexible bag can be corrugated, and the flexible bag has a limit function on the traction body, namely, the movement of the handle is prevented when the flexible bag is extended to the maximum extent.
The beneficial effects of the invention are as follows:
1. the upper space of the fluid inlet is internally provided with a non-cystic elastic body or a cystic elastic body, and the free part of the cystic elastic body drives a sharp destroying component on the free end of the destroying body to destroy the tissue mass which blocks the fluid inlet, so that the tissue mass is broken and is easy to clean.
2. The finger presses the power body connected with the catheter, so that the gas or liquid in the cavity of the power body can be injected into the cavity of the elastic body through the path of the elastic body to drive the free part of the elastic body to deform, and the operation is convenient.
3. Various types of sharp destructive elements meet different clinical needs, such as spike-like, hook-like, sickle-like, blade-like, tooth-like, anchor-like in shape.
4. The design of the free part of the various cystic elastic bodies meets different clinical requirements, such as bellows type, eccentric type, bifurcation at a far end point, local thin wall type at the far end point, through hole type, wall attaching type and suspended type of the free part of the cystic elastic bodies at the far end point.
5. The wall of the damaged body and the wall of the fluid inlet are designed in three types of position relation of an adherence outer sleeve type, an adherence inner sleeve type and a non-adherence type, so that different clinical requirements are met.
6. The wall thickness at the fluid inlet is less than 50% of the average thickness of the catheter wall by arranging the fluid inlet on the thin-wall sleeve, so that the friction resistance is reduced, the tissue mass such as blood clots is easier to contact with the damaged member, and the tissue mass is easier to be attracted by negative pressure to move towards the catheter cavity.
7. The booster helps the position of the cystic elastic body to fully restore after expansion so as to improve the working efficiency.
8. Flushing liquid enters the upper space of the fluid inlet, the space adjacent to the fluid inlet and the inner space of the fluid inlet along the flushing passage of the catheter wall through the flushing hole, so that blood clots blocking the fluid inlet and the like are shifted to be convenient for destroying the component function, and broken fragments are flushed into the inner cavity of the catheter and are sucked by negative pressure to be discharged out of the body.
9. The negative pressure bag with elastic restoring force is communicated with the catheter, and the power body in the bag is adjacent to or integrated with the negative pressure bag, so that the blood clots are destroyed, fragments are sucked and synchronously combined, and the single-hand operation is facilitated.
10. The traction body is pulled out of the inner cavity of the catheter to drive the elastic body to deform, and the damage component connected with the elastic body and/or the damage component below the thin-wall synchronous damage body on the traction body can move up and down to cut and damage blood clots positioned in the space adjacent to the fluid inlet and/or the space inside the fluid inlet.
11. The inner cavity of the catheter below the fluid inlet is embedded with a protective sheet to limit the stroke of the damaged component and protect the soft catheter wall from being damaged by the sharp damaged component.
12. The traction body is pulled by the handle to deform the free part of the elastic body so as to be elongated, the free part of the elastic body is retracted due to the self-restoring capability after the traction is released, and the operation is repeated so as to drive the damage member to move at the fluid inlet, and the elongated traction body is also helpful for sucking and removing fragments in the inner cavity of the catheter during the movement.
In addition to the above, the invention also has other beneficial effects described in each embodiment, and in clinical application, by combining three effects of cutting, scouring and negative pressure suction through the external operation of the catheter, the blood clot blocking the fluid inlet and the like are removed from the body, so that the invention not only can be used for guaranteeing smooth drainage, but also can be used for removing hematomas in human bodies such as intracranial, thoracic cavity and the like.
Drawings
Fig. 1A: a schematic structural diagram of an existing medical catheter-catheter;
fig. 1B: a schematic of a larger clot blocking the fluid inlet;
fig. 1C: a schematic of a plurality of blood clots embedded in a fluid inlet;
fig. 1D: the cross section shows the fluid inlet interior space S1 and the adjacent space S2;
fig. 1E: a cross section shows one structure of embodiment 1;
Fig. 1F: embodiment 1 a schematic view of the destructive element 33 in the fluid inlet space S1;
fig. 1G: example 1 a schematic view, partially cut away, from one view, shows a complete lesion 3;
fig. 1H: example 1 a partial cross-sectional view of a bladder power body 6;
fig. 1I: example 1 schematic representation of a destructive element 33 breaking a blood clot M into fragments M1;
fig. 2A: a partial cross-sectional view of example 2;
fig. 2B: the schematic structure of example 2, arrows indicate the liquid flow direction;
fig. 2C: example 2 schematic structural view with the addition of sleeve 4;
fig. 2D: example 2a partially cut-away schematic view of sleeve 4;
fig. 2E: example 2a schematic structural view of the sleeve 4;
fig. 3A: various types of destructive elements 33 in example 3;
fig. 3B: example 3 series of bellows-type cystic elastomer free section 22;
fig. 3C: example 3 schematic structural illustration of eccentric cystic elastomer free section 22;
fig. 3D: example 3a schematic structural view of a bifurcated cystic elastomer free section 22 in the series;
fig. 3E: example 3a schematic view of the distal through-hole type cystic elastomer free section 22;
fig. 3F: example 3 series of schematic structural drawings of wall-mounted cystic elastomer free section 22;
Fig. 3G: example 3 series of a schematic diagram of a direct combination of a capsular elastomer and a blade like destructive element;
fig. 4A: a schematic partial cut-away of example 4;
fig. 4B: a schematic cross-sectional view of the catheter head of example 4;
fig. 4C: the schematic cross-sectional view of the balloon elastomer 2 of example 4 in its inflated state;
fig. 5A: a schematic partial cut-away of example 5;
fig. 5B: a partially cut-away schematic illustration of example 5, with the fragment M1 moving towards the negative pressure bladder 8, the arrow indicating the direction of movement;
fig. 6A: a schematic partial cut-away of example 6;
fig. 6B: a partially cut-away schematic view of example 6, the negative pressure bladder 8 being flattened and the fragments M1 being expelled;
fig. 7A: schematic partial cross-sectional view of example 7;
fig. 7B: the sleeve 4 of example 7 is a schematic cross-sectional view;
fig. 7C: schematic structural diagram of the damaged body 3 of example 7;
fig. 7D: example 7 schematic structural diagram of the use state of the damaged body 3;
fig. 7E: a schematic cross-sectional view of thin-walled inlet member 45 in the example 7 series;
fig. 7F: a schematic cross-sectional view of thin-walled inlet member 45 in use with a lesion 3 in the series of versions of example 7;
fig. 8A: schematic structural diagram of the adherent coated damaged body 3 of example 8;
fig. 8B: a schematic cross-sectional view of the disc-shaped intermediate body 5 and the damaged body 3 of example 8;
Fig. 8C: example 8 schematic structural diagram of the use state of the damaged body 3;
fig. 8D: a schematic cross-sectional view of the thin-walled inlet member 45 is employed in the embodiment 8 series;
fig. 8E: schematic cross-sectional view of the lesion 3 in use in the embodiment 8 series;
fig. 8F: a schematic perspective view of the series of protocols of example 8 with the fluid inlet 101 blocked by the clot M;
fig. 9A: a schematic partial cut-away view of example 9;
fig. 9B: schematic representation of the inflated state of the balloon elastomer free portion 22 of example 9;
fig. 9C: schematic structure of the fluid inlet 101 of example 9;
fig. 10A: an angular partial cutaway schematic of example 10;
fig. 10B: another angular partial cutaway schematic view of example 10;
fig. 10C: example 10 schematic representation of the inflated state of the balloon elastomer free portion 22
Fig. 11A: a schematic partial cut-away view of example 11;
fig. 11B: non-capsular elastomer positional displacement schematic of example 11;
fig. 12A: schematic partial cut-away structure of example 9;
fig. 12B: schematic cross-sectional view of example 9;
fig. 12C: a schematic partial cut-away view of example 9;
fig. 12D: schematic of the structure of the catheter tail 13 of example 9;
fig. 13A: schematic partial cut-away structure of example 10;
Fig. 13B: the catheter tail 13 of example 10 is schematically shown;
fig. 13C: example 10 schematic partial section of MM for removal of intracranial subdural hematoma.
Detailed Description
In the prior art medical catheter, as shown in fig. 1A, for example, the catheter head 11 of the catheter 1 enters the bladder B, the filled fixed cystic elastic body 143 prevents the catheter head 11 from falling out of the bladder cavity B0, the fixed cystic elastic body filling side branch 14 is internally provided with the one-way valve 141, and the fluid injected into the fixed cystic elastic body 143 is prevented from flowing out of the opening 142; the middle part 12 of the catheter is partially or completely positioned in the body, the tail part 13 of the catheter is positioned outside the body, the head part 11 of the catheter is provided with a fluid inlet 101, the tail part 13 is provided with a fluid outlet 102, and the space between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 is the fluid inlet inner space S1 because the catheter has a wall thickness; during the urine drainage process, one or more blood clots M and other tissue lumps in the inner cavity of the bladder have a high probability of being embedded into the fluid inlet 101, and the inner space S1 of the fluid inlet is filled, as shown in fig. 1B and 1C; fig. 1D shows that the top end part 111 of the existing medical catheter 1 seals the opening at the upper end of the catheter head, and the fluid inlet 101, the fluid inlet inner space S1 and the fluid inlet adjacent space S2 are sequentially connected, which are all places where the blockage of tissue masses is easy to occur, urine is difficult to enter the catheter inner cavity 10 after the blockage occurs, one scheme of the prior art is that a flushing passage 03 is arranged in the catheter wall 0, the flushing passage 03 is provided with a flushing hole 030 on the inner surface 01 of the catheter wall, the flushing hole 030 is provided in the fluid inlet adjacent space S2 and faces the fluid inlet 101, and an arrow indicates the water flow direction, but the design can temporarily eliminate the blockage of the flushing fluid inlet 101 such as blood clot, but the blood clot is difficult to clear out of the body through the catheter inner cavity 10, and a series of problems such as infection, urination obstacle after the catheter is pulled out easily occur.
Example 1:
as shown in fig. 1E, a medical catheter with elimination of obstruction, a hollow catheter 1 main body is composed of a catheter head 11, a middle part 12 and a tail part 13 which are connected integrally, a top end part 111 is in sealing connection with a top end face 110 of the catheter head 11 and seals a top end opening 103 of the catheter head, an inner surface 1111 of the top end part 111 forms a top face of a catheter inner cavity 10 (as shown in fig. 1F), a fluid inlet 101 is arranged below the top end part 111, a tail part 13 is provided with a fluid outlet 102, the fluid outlet 102 is communicated with the catheter inner cavity 10, a blood clot M can enter the fluid inlet 101 along the outer surface 02 of the catheter wall, the fluid inlet 101 is blocked due to embedding of the blood clot M, an inflatable elastic body 2 is arranged in an area adjacent to the fluid inlet 101 of the catheter inner cavity 10, namely, a fluid inlet upper space S3 is provided with an inflatable elastic body 2 after filling, the elastic body 2 is composed of an elastic body connecting part 21 and an elastic body free part 22, the elastic body connecting part 21 in a tubular shape is directly connected with the inner surface 01 of the catheter wall in a sealing manner, such as bonding or welding, and the like, the elastic body inner cavity 20 is communicated with an elastic body 00 arranged on the catheter wall 0 through a bonding or communication hole; the distal end 221 of the free portion of the elastic body is directed to the fluid inlet 101 and the adjacent space S2 of the fluid inlet, and the free portion 22 of the elastic body is in a suspended state before being inflated, that is, the outer surface of the free portion 22 of the elastic body is not contacted with the inner surface 01 of the catheter wall; the medical catheter also comprises a damage body 3 which can be driven by the expanded elastic body free part 22 to displace, the connecting end 31 of the damage body 3 is directly or indirectly contacted with the elastic body free part 22, the fine free end 32 of the damage body 3 is provided with a sharp damage component 33, which can be made of metal materials, ceramics and the like, a hollow power body 6 is sleeved at the tail part 13 of the medical catheter in a saccular manner or is connected with a side branch (not shown) of the elastic body passage of the tail part 13 of the medical catheter, and the power body inner cavity 60 is communicated with the elastic body passage 00 through an opening 002.
The power body 6 is preferably made of a self-elastic material, such as silicone rubber, and after the power body 6 is pressed (fig. 1H), gas or liquid in the inner cavity 60 of the power body can be injected into the inner cavity 20 of the elastic body through the passage 00 of the elastic body, so that the free part 22 of the elastic body expands and deforms to drive the damage body 3 to displace downwards, as shown in fig. 1F and 1G, and the damage member 33 enters the adjacent space S2 of the fluid inlet and the inner space S1 of the fluid inlet; the elastic body free part 22 is contacted with and breaks the tissue mass such as blood clot M (figure 1I), the elastic body is restored by self after the compression of the power body 6 is released, the fluid entering the inner cavity 20 of the elastic body is pumped back, the elastic body free part 22 is connected with the broken body 3 and the broken component 33 on the broken body, the degree of expansion of the elastic body free part 22 is different because of different degrees of pressing the power body 6 each time by taking an operator as an example manually manner, the action positions of the broken body 3 and the broken component 33 on the broken body are different, and the blood clot M and other tissue mass of various space positions can be continuously broken until the blockage of the fluid inlet 101 is relieved; the power body 6 may be a capsule-like power body or a syringe-like piston power body (not shown).
The moving destructive element 33 is directed towards the fluid inlet 101, preferably into or through the fluid inlet interior space S1, said fluid inlet interior space S1 being the area of space between the fluid inlet inner edge line L1 and the outer edge line L2, which space is usually filled for the most part by blood clots M etc. blocking the fluid inlet 101; the destroying member 33 repeatedly enters and exceeds the fluid inlet inner space S1, namely, the destroying member 33 moves to a position exceeding the outer edge line L2, so that tissue masses such as blood clots M and the like can be mechanically broken more actively; the expansion and deformation of the balloon elastomer free portion 22 can drive the destructive element 33 to move at the fluid inlet 101, so that the blood clot M or other type of tissue mass blocked at the fluid inlet 101 can be broken by repeated cutting, puncturing and the like, and the broken portion M1 (FIG. 1I) can not continuously block the fluid inlet 101 due to the significantly smaller external dimension, so that the blood clot M can be more easily discharged out of the body through the catheter lumen 10.
The bladder elastic body 2 may also be disposed in the fluid inlet adjacent space S2 or across both the fluid inlet upper space S3 and the fluid inlet adjacent space S2.
The catheter lumen 10 is adjacent to the associated region of the fluid inlet 101, which comprises two spatial structures, one of which continues to extend above the fluid inlet 101 to form a fluid inlet upper space S3, and the other of which is adjacent to the fluid inlet adjacent space S2 of the fluid inlet 101, in which the cystic elastic body can be partially or wholly accommodated; the fluid inlet adjacent space S2 is a space which is necessary for drainage, and the fluid inlet upper space S3 can be omitted, but the concept that the fluid inlet upper space S3 partially or completely accommodates the cystic elastic body 2 can ensure that the fluid inlet adjacent space S2 is not occupied continuously, thereby facilitating the body fluid such as urine, gastric juice and the like drained by the living body to enter the catheter inner cavity 10 more easily; the elastic body 2 is expandable and deformable after filling and is similar to elastic output, the elastic body 2 can be made of compliant or partially compliant materials such as silicone rubber, thermoplastic elastomer and the like, has elasticity, and also has certain capacity of actively restoring a restoring state after filling, namely, after releasing the fluid pressure of the inner cavity 20 of the elastic body, the shape of the elastic body 2 can be restored autonomously, and can be restored completely or to a certain extent; the elastic body 2 can also be made of non-compliant materials such as block polyether amide, polyamide and the like, and the filling deformation and the form restoration are all dependent on the change of the fluid pressure of the inner cavity 20 of the elastic body; the fluid inlet upper space S3 communicates with the fluid inlet adjacent space S2, and the bladder elastic body 2 is at least mostly positioned in the fluid inlet upper space S3 before being inflated, and the distal end 221 of the free portion of the bladder elastic body moves to approach or enter the fluid inlet adjacent space S2 after being inflated.
The free end 32 of the damaged body 3 is provided with a sharp damaged member 33, and the optimal scheme is that the damaged body 3 is provided with the sharp damaged member 33 at the part which is not in direct contact with the free part 22 of the cystic elastic body so as to avoid damaging the cystic elastic body 2; the destructive element 33 is far away from the elastic balloon body 2, and is not destroyed by the destructive element 33 even when the free balloon body portion 22 is expanded and deformed to the limit.
Example 2:
unlike the above embodiment, as shown in fig. 2A, the inner cavity 20 of the elastic balloon body is in fluid communication with the elastic balloon body passage 00 provided on the wall 0 of the catheter through the communication hole 001 directly provided on the inner surface 1111 of the tip end part 111 of the catheter, in this embodiment, the communication hole 001 is specifically provided on the downward hollow protruding portion 1112 of the inner surface 1111 of the tip end part 111, the hollow protruding portion 1112 is partially wrapped by the connecting portion 21 of the elastic balloon body 2, the opening of the protruding portion 1112 toward the inner cavity 20 of the elastic balloon body is the communication hole 001 of the inner cavity 20 of the elastic balloon body, the catheter head 11 is closed by the tip end part 111 made independently, the inner passage 1110 of the tip end part 111 is connected with the elastic balloon body passage 00, the tip end part 111 may be an independent part and the tip end face of the catheter head 11 are sealed, and the tip end part 111 may also be made integrally with the part below the tip end face of the catheter head 11.
As shown in fig. 2B, further comprising a flushing passageway 03 ascending along the catheter wall 0, the flushing passageway 03 being in communication with the fluid inlet headspace S3 and/or the fluid inlet proximal space S2 through a flushing hole 030; the flushing passage 03 is communicated with a flushing side branch passage 150 arranged on a flushing side branch 15 of the catheter tail 13, flushing fluid (usually sterile physiological saline) enters the flushing side branch passage 150 through an external opening 151 of the flushing side branch passage 150, the flushing passage 03 flowing through the catheter wall 0 enters a fluid inlet upper space S3 and/or a fluid inlet adjacent space S2 through a flushing hole 030, one flushing hole 030 can be arranged or a plurality of flushing holes can be arranged, and the flushing passage 03 can be arranged in a fluid inlet inner space S1 (not shown in the figure); the flushing channel 03 aims at combining the effects of water flow impact, blood clot M position movement, anti-adhesion, washing and drug administration with the effect of destroying the blood clot M and other tissue masses by the destroying component 33, and rapidly cleaning a large number of broken parts M1 of the blood clot and other tissue masses to the outside of the body with the assistance of negative pressure suction of the catheter inner cavity 10, wherein arrows indicate the water flow direction; a negative pressure source and corresponding tubing may be externally connected to the fluid outlet 102 of the conduit tail 13.
Further, in this embodiment, the upper space S3 of the fluid inlet is nested with a thin-walled sleeve 4 with a completely open top, the free portion 22 of the elastic body 2 is located in the sleeve cavity 40, and the sleeve cavity 40 is communicated with the adjacent space S2 of the fluid inlet; the sleeve 4 with the hard thin wall is embedded into the flexible catheter, so that the damage of the damage component 33 and the like can be avoided when the catheter is extruded externally, and the accidental damage of the normal tissue by the damage component 33 can be avoided; the sleeve 4 may be made of a thin-walled metallic material such as stainless steel or the like with the sleeve inner surface 42 being smooth or with the addition of a lubricating substance to reduce frictional resistance with the outer surface of the expanding balloon elastomer free portion 22; the fully open, thin-walled sleeve 4 means that the sleeve upper opening 402 is equal or nearly equal to the sleeve average inner diameter, the sleeve upper end surface 401 is facing the inner surface 1111 of the catheter head tip component 111 or is in abutment with the inner surface 1111; in this example, the upper end surface 401 of the sleeve abuts against the inner surface 1111 of the top end member 111, and the inner cavity 40 of the sleeve is the upper space S3 of the fluid inlet; the flushing holes 030 of the flushing channel 03 in the catheter wall 0 can be opened in the sleeve 4.
The sleeve 4 is formed by partially closing the top of the sleeve 4, namely, the sleeve 4 facing the inner surface 1111 of the top part 111 of the catheter head is provided with a structure for partially closing the opening above the sleeve to form a sleeve top 41, the sleeve top 41 can increase the structural strength of the sleeve 4, but at the same time, the sleeve top 41 is provided with an opening or a passage for filling fluid into the cavity of the elastic body, in this example, the hollow part 420 of the downward sleeve top protrusion 46 of the sleeve top 41 is communicated with the communication hole 001, and in this example, the elastic body connecting part 21 is wrapped and fixed outside the sleeve top protrusion 46; as a variant of the same concept, the sleeve side wall may also be provided with openings or hollow protrusions, preferably at an angle to the axis L0 towards the fluid inlet adjacent space S2 (not shown); the sleeve 4 can be completely attached to the inner surface 01 of the conduit wall forming the fluid inlet upper space S3, in which case the sleeve cavity 40 is formed as the fluid inlet upper space S3, and the sleeve 4 can be partially embedded in the fluid inlet upper space S3; the sleeve 4 is not required to be continuous in periphery, can be a multi-part defect, and can realize the guiding and protecting effects on the specific cystic elastic body 2 and the damaged body 3; the idea is that the sleeve 4 and the adjacent conduit wall are integrally molded or formed, and can be made of metal and medical polymer materials, so that independent sleeve 4 components can be omitted.
Example 3:
the specific shape of the destructive element 33 is shown in fig. 3A as a combination of one or more of sharp spikes 331, hooks 332, sickles 333, blades 334, teeth 335, anchors 336.
The series of embodiments show various structures of the elastic body 2, as shown in fig. 3B, the free portion 22 of the elastic body 2 is in the form of bellows, the distal end 221 of the free portion of the elastic body is partially thin, at least the average thickness of the distal end portion at the distal end point a is smaller than that of other regions, if the elastic body 2 is made of materials with the same hardness, the thin wall is easier to expand and deform and displace under the same filling pressure, and the specific positions involved in filling and restoring each time are different, so that the damage member 33 can be driven to fully act in each corner in the fluid inlet internal space S1 and the fluid inlet adjacent space S2; the bellows type is at least in the area close to the connecting part 21 of the elastic body, the bellows type is designed to be bellows type, the bellows part extends without increasing or not significantly increasing the outer diameter after the fluid in the inner cavity 20 of the elastic body, the outer surface of the free part 22 of the elastic body 2 of the bellows type does not generate significant friction with the inner surface 01 of the conduit wall, and the movement of the damaged body 3 is not influenced; the flexible structure (not shown) is that the free part 22 of the elastic body is composed of a corrugated pipe section and a smooth section, the smooth section is positioned at the far end, a damage body 3 is arranged outside the smooth section, the smooth section and the damage body 3 positioned on the smooth section partially extend into or do not extend into a fluid inlet adjacent space S2 before the free part 22 of the elastic body expands, the corrugated pipe section is designed into a corrugated pipe shape in a region close to the connecting part 21 of the elastic body, the corrugated pipe section extends without increasing or obviously increasing the outer diameter after the inner cavity 20 of the elastic body is filled with fluid, obvious friction with the inner surface 01 of the guide pipe wall does not influence the movement of the damage body 3, and the smooth section can deform to a greater extent after being expanded so as to drive the damage body 3 to displace; the preferred detail is that the bellows section has a greater wall thickness than the smooth section, with the same filling pressure resulting in a reduced radial expansion of the bellows section and a greater expansion of the smooth section.
FIG. 3C shows an eccentric configuration of the free portion 22 of the elastic balloon body 2, wherein the distal end 221 of the free portion of the elastic balloon body is biased toward the fluid inlet 101, and the free portion 22 is inflated to more easily drive the lesion 3 to contact with the tissue mass such as blood clot at the fluid inlet 101; the eccentric elastic body free part 22 refers to the eccentric of the free part 22 which forms a certain angle with the central axis L0 of the catheter inner cavity 10 before or after the expansion, and the free part 22 after the eccentric drives the sharp damage member 33 on the free end 32 of the damage body 3 to more easily reciprocate in the fluid inlet inner space S1, so as to accurately crush and damage the tissue masses such as blood clots M and the like positioned in the fluid inlet inner space S1 and outside the fluid inlet inner space S1.
FIG. 3D shows a medical catheter with opposing dual fluid inlet 101, wherein the free portion 22 of the balloon-like elastic body 2 is in a distal point A split configuration, and wherein each of the distal ends 221 of the free portion is connected to a destructive body 3, and wherein the destructive members 33 on the destructive body 3 are capable of acting on tissue masses such as blood clots adjacent to the fluid inlet 101, respectively; when the catheter 1 is provided with two or more fluid inlets 101, the balloon elastomer free portion 22 is bifurcated at the distal point, one fluid inlet 101 for each bifurcation, ensuring precise unblocking at each fluid inlet 101.
Fig. 3E shows a through hole structure at the distal end 221 of the free portion of the elastic body 2, and a penetrating body 34 partially enters the through hole 2210 to seal and connect the distal end 221 of the free portion of the elastic body 2 with the connecting end 31 of the damaged body, and the main body of the penetrating body 34 may be sheet-shaped, so as to increase the contact area with the fluid in the inner cavity 20 of the elastic body, thereby facilitating the output of pressure and being easier to drive the damaged body 3 to displace.
Fig. 3F shows the free portion 22 of the elastic balloon body 2 in a wall-attached form, that is, the outer surface of the free portion 22 of the elastic balloon body 2 is partially or mostly in contact with the inner surface of the upper space S3 of the fluid inlet, which may be the inner surface 01 of the wall of the catheter or the inner surface of the sleeve 4 therein, and the structure of the elastic balloon body 2 can make the fluid filled in the inner cavity 20 of the elastic balloon body more for driving the free portion 22 of the elastic balloon body to deform downwards, rather than for radially filling the upper space S3 of the fluid inlet first, especially when the elastic balloon body 2 is used, the filled fluid (preferably gas) makes the free portion 22 easily expand and deform towards the region of the upper space S3 of the fluid inlet which is not filled; the wall-attached type elastic body free part 22 can fully utilize the upper space S3 of the fluid inlet, so that the position of the elastic body free part 22 before filling is more stable, and the elastic body free part can be deformed in a preset direction more accurately after filling.
Fig. 3G shows a direct attachment of the elastic balloon 2 to the blade like destroying member 334, resembling a cardiovascular cutting balloon, with the elastic balloon free portion 22 being attached to a plurality of blade like destroying members 334 adjacent to the fluid inlet 101, and the elastic balloon free portion 22 being inflated to drive the blade like destroying members 334 to cut blood clots M (not shown).
Example 4:
FIG. 4A shows the free portion 22 of the capsular elastic body in dynamic engagement with the lesion 3 via the disc-shaped intermediate body 5; the disc-shaped intermediate body 5 is provided with an upwardly facing and/or downwardly facing skirt 51, the outer surface of which is in sliding contact with the inner sleeve surface 42 in the fluid inlet headspace S3.
The power fit means that the damage body 3 can be driven to displace or deform dynamically when the free part 22 of the cystic elastic body expands and deforms, so that the damage member 33 can contact and damage tissue masses such as blood clots M and the like at the fluid inlet 101; when the fluid inlet headspace S3 is nested with a thin walled sleeve 4, the disc-shaped intermediate skirt outer surface 53 is in sliding contact with the smooth sleeve inner surface 42; the disc-shaped intermediate body 5 plays a role in guiding the piston-type movement, stabilizing the position, transmitting the thrust when the free part 22 of the cystic elastic body expands and deforms to enable the far end to move downwards, amplifying the thrust, limiting and lubricating the skirt edge 51, and the disc-shaped intermediate body 5 can be made of self-lubricating materials or can be coated with lubricating substances on the surface of the skirt edge 51; for weight saving, the disc-shaped intermediate body 5 may be hollowed out (not shown).
The lower part of the sleeve 4 is provided with ribs 43 protruding horizontally to the sleeve cavity 40, the ribs 43 can protrude continuously or discontinuously circumferentially, the upper surfaces 431 of the ribs are in contact with a booster body which helps the position of the cystic elastic body 2 to recover fully after the expansion is released, in the example, the booster body is a pressure spring, the lower end of the pressure spring 7 is propped against the upper surface 431 of the sleeve ribs, the upper end of the pressure spring 7 is propped against the lower surface 52 of the disc-shaped intermediate body, and fig. 4B is a state that the pressure spring 7 is stretched before the expansion of the cystic elastic body free part 22; as shown in fig. 4C, the expansion deformation of the free portion 22 of the elastic body drives the disc-shaped intermediate body 5 to move downwards along with the damaged body 3, the compression spring 7 is compressed, the elastic potential energy is reserved, when the fluid filling of the free portion 22 of the elastic body is released, the compression spring 7 is not pressed any more, the elastic potential energy is released to drive the disc-shaped intermediate body 5 to reset upwards, and the state of the compression spring 7 is restored as shown in fig. 4B; when the balloon elastomer free portion 22 expands, the disruption member 33 on the disrupter 3 locally disrupts the blood clot M into a plurality of smaller sized disrupted portions M1, i.e., fragments, which are small enough to block the catheter lumen 10 and are easily removed from the body.
The booster of the invention can be one or more of tension springs and compression springs with different shapes, and the booster directly or indirectly acts on the cystic elastic body 2 and/or the damaged body 3 to assist the filling expansion of the free part 22 of the cystic elastic body or assist the release expansion thereof, namely assist the restoration thereof; when the tension spring is used as a restoring booster, the tension spring can also be placed in the inner cavity 20 of the elastic body, that is, the upper end of the tension spring is connected to the inner surface of the top end part, and the lower end of the tension spring is fixed at the distal end 221 (not shown) of the free part of the elastic body.
The booster body can be arranged in the upper space S3 of the fluid inlet, and the free part 22 of the cystic elastic body after the booster expansion is quickly restored to the original state; the shape recovery of the elastic body free part 22 may be promoted by suction under negative pressure; the other booster body can be arranged at the tail part 13 outside the catheter body of the user and acts on the power body 6, so that the volume of the inner cavity 60 of the booster power body is reduced rapidly or restored rapidly, and the efficiency of filling and expanding and releasing the expansion of the free part 22 of the cystic elastic body is improved, namely, the damage efficiency of the damage component 33 on the damage body 3 to the tissue masses such as blood clots blocking the fluid inlet 101 is directly improved.
Example 5:
unlike the previous embodiment, in order to improve the destruction efficiency and promote the massive fragments formed by the broken tissue masses such as blood clots to be discharged out of the body through the catheter lumen 10 in time, as shown in fig. 5A, the present invention further comprises a negative pressure balloon 8 with elastic restoring force, wherein the negative pressure balloon 8 is a hollow balloon-shaped power body, the negative pressure balloon lumen 80 is communicated with the catheter lumen 10, and the balloon-shaped power body 6 is adjacent to the negative pressure balloon 8.
After the negative pressure bag 8 is extruded, the volume of the inner cavity 80 of the negative pressure bag is reduced, and after the hand is loosened, the elastic restoring force of the negative pressure bag generates negative pressure and acts on the inner cavity 10 of the catheter, so that the tissue masses such as blood clots M blocked at the fluid inlet are attracted and move towards the inner cavity 10 of the catheter, even the tiny movement is favorable for the damage member 33 to be more easily contacted with the tissue masses such as the blood clots M and fully damaged, the tissue masses such as the blood clots M are prevented from being retracted into the cavity of a human body, and the damage efficiency is improved; the size of the negative pressure bag 8 is preferably convenient for an operator to hold in his hand; the negative pressure bag 8 is assembled on a negative pressure bag side branch 16 connected with the tail part 13 of the catheter, and a negative pressure bag side branch passage 160 communicated with the inner cavity 10 of the catheter is communicated with the inner cavity 80 of the negative pressure bag; as shown in fig. 5B, the bulk of the broken portion M1 of the tissue mass, i.e., fragments, eventually exits the body through the suction bladder side branch passage outer opening 162; the opening in the negative pressure sac side branch passage is communicated with the inner cavity 10 of the catheter (not shown); in use, the catheter fluid outlet 102 can be closed by clamping the pipeline and other methods; the negative pressure bag 8 is internally provided with a one-way valve structure (not shown) to ensure that negative pressure attractive force is generated on the inner cavity 10 of the catheter, flushing fluid entering through the flushing side branch 15 is combined to attract the blood clot M to be adjacent to the fluid inlet for spatial displacement, then the adjacent saccular power body 6 is repeatedly pressed, the damage member 33 is driven by the saccular elastic body 2 to repeatedly damage the blood clot M, flushing is started simultaneously, and a plurality of fragments M1 with small volumes are pushed by the flushing fluid and are attracted by the flushing fluid together with the negative pressure, so that the fragments M1 are continuously discharged out of the body.
Example 6:
as shown in fig. 6A, the volume of the negative pressure bag 8 is larger than that of the saccular power body 6, so that the clinical operation is convenient, the saccular power body 6 and the negative pressure bag 8 are integrated, the single-hand operation is convenient, fig. 6B shows the state that the negative pressure bag 8 is flattened, the negative pressure bag cavity 80 can generate negative pressure to attract the broken part M1 to enter the negative pressure bag cavity 80 after the hand is loosened, the negative pressure bag 8 is extruded again after shape recovery, and positive pressure generated in the extrusion process can discharge the broken part M1 entering the negative pressure bag cavity 80 out of the body from the negative pressure bag side branch passage outer opening 162.
The integrated fusion means that at least the main body part of the negative pressure bag 8 and the main body part of the bag-shaped power body 6 are integrally formed, namely, the integrated power body is composed of the same material with continuous structure, the cost is lower, the production efficiency is higher, and a one-way valve (not shown) in the integrated power body is additionally assembled.
Example 7:
the present example shows an inner attaching sleeve type structure of the damaged body 3, wherein the inner attaching sleeve type means that at least one part of the damaged body 3 is closely contacted or adjacent to the inner surface 01 of the catheter wall or a thin-wall part nested on the inner surface 01 of the catheter wall, so as to play a reliable role in limiting and guiding; as shown in fig. 7A, 7B and 7C, the fluid inlet upper space S3 is nested with the thin-walled sleeve 4, in this example, the sleeve 4 completely fits the inner surface of the fluid inlet upper space S3, the sleeve inner cavity 40 forms the fluid inlet upper space S3, and the disc-shaped intermediate body 5 skirt 51 is located in the sleeve inner cavity 40; the disc-shaped intermediate body 5 is provided with a downward connecting rod 54, the connecting rod 54 is firmly abutted with the connecting end 31 of the damaged body, the connecting rod 54 can drive the damaged body 3 to move up and down, the free end 32 of the damaged body 3 is provided with a thin-walled horizontal part 321, the horizontal part 321 is provided with a plurality of cutting holes 3210, the sharp edge of the cutting holes 3210 is used for cutting blood clots M, the edge of the horizontal part 321 is upward extended part 322, at least the outer contour of the extended part 322 is matched with the inner surface 42 of the sleeve, the groove-shaped hole 3220 on the extended part 322 can reduce the contact area with the inner surface 42 of the sleeve and is beneficial to reducing sliding friction force, the edge of the horizontal part 321 is connected with an arc-shaped damaged member 337 with a blade downward at the fluid inlet 101, the position close to the arc-shaped damaged member 337 is provided with a hook-shaped damaged member 332, and the arc-shaped damaged member 337 is detected in advance into the inner space S1 of the fluid inlet; the horizontal part 321 of the free end 32 of the damaged body 3 is positioned below the bottom 44 of the sleeve, the connecting end 31 of the damaged body passes through the central hole 440 on the bottom 44 of the sleeve in a column shape, the upward extending part 322 of the free end 32 of the damaged body 3 passes through the notch 443 of the bottom 44 of the sleeve, the extending part 322 can move up and down in the notch 443, and the outer surface 3221 of the extending part is close to or attached to the inner surface 42 of the sleeve; the upper surface 441 of the bottom of the sleeve is abutted against the lower end of the pressure spring 7 which helps the position of the elastic body 2 after the expansion is released and fully restored, the upper end of the pressure spring 7 is abutted against the lower surface 52 of the disc-shaped intermediate body, fig. 7A shows the state that the pressure spring 7 before the expansion of the free part 22 of the elastic body is stretched, and the flushing hole 030 is opened on the catheter wall 0 between the two fluid inlets 101; as shown in fig. 7D, the elastic body free part 22 of the bag-like elastic body expands and deforms to push the disc-shaped intermediate body 5 to move downwards along with the damaged body 3, the upward extending part 322 of the damaged body 3 slides close to the inner surface 42 of the sleeve, the pressure spring 7 is compressed, elastic potential energy is stored, a plurality of cutting holes 3210 on the damaged body 3, arc-shaped damaged members 337 with downward edge blades of the horizontal part 321 and blood clots M in the hook-shaped damaged members 332 act on the blood clots M to damage the blood clots, and the flushing holes 030 jet physiological saline to flush synchronously; when the fluid filling of the elastic body free part 22 is released, the pressure spring 7 is not pressed any more, the elastic potential energy is released to push the disc-shaped intermediate body 5 to reset upwards, the state of the pressure spring 7 is restored as shown in fig. 7A, the blood clot M is finally broken into a plurality of fragments with smaller volumes through repeated operation, the fragments are small enough to block the catheter inner cavity 10, and the blood clot M is easy to be removed outside the body by combining negative pressure suction.
In the above embodiments of the present invention, the fluid inlet 101 is formed on the catheter wall 0, the distance between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 is the thickness of the catheter wall 0, and the catheter 1 is generally manufactured by extrusion molding, the thickness of the catheter wall 0 is mostly uniform, for example, the wall thickness of a silicone catheter is about 1mm, compared with the wall thickness of about 0.2mm, the inner space S1 of the fluid inlet between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 is larger, the area between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 contacting the surface of the blood clot M after the blood clot M is embedded is also larger, and forms larger friction resistance with the blood clot M, so that the blood clot M is not easy to enter the adjacent space S2 of the fluid inlet, to solve this problem, as shown in fig. 7E and 7F, the fluid inlet 101 is formed by a thin-walled inlet member 45, the fluid inlet 101 is opened on the inlet member 45, the fluid inlet 101 is flush or nearly flush with the outer surface 02 of the catheter wall, the wall thickness of the catheter body is 1mm as a reference, the wall thickness of the inlet member 45 is less than 0.2mm, the inner space S1 of the fluid inlet between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 is significantly reduced, the blood clot M is easier to enter the adjacent space S2 of the fluid inlet, and after water is injected into the elastic body cavity 20, the expansion deformation drives the arc-shaped damage member 337 to cut and damage the blood clot M into a plurality of fragments, namely the broken part M1 (as shown in fig. 7F); the inlet part 45 may be a separate part, which is nested or adhered and welded to the pipe wall 0, and may be made of metal or thin-walled resin material, and the inlet part 45 may be integrally formed with or connected to the sleeve 4 (see fig. 7E).
Example 8:
as shown in fig. 8A, 8B and 8C, the main body of the damaged body 3 is an adhered jacket type, specifically, a part of the damaged body 3 is sleeved on the outer surface 02 of the catheter wall, that is, is closely contacted with or adjacent to the outer surface 02 of the catheter wall, the free end 32 of the damaged body 3 is provided with a thin-walled horizontal portion 321, the horizontal portion 321 is provided with a plurality of cutting holes 3210, the sharp edges of which are used for cutting blood clots M, the edge of the horizontal portion 321 is connected with an upward lamellar jacket portion 323, at least the inner contour 3231 of the jacket portion 323 is in shape with the outer surface 02 of the catheter wall matched with the upper lamellar jacket portion 323, the jacket portion 323 can be provided with holes similar to the slot-shaped holes of the embodiment 7 so as to reduce the contact area with the outer surface 02 of the catheter wall, thereby helping to reduce sliding friction force, and the edge of the horizontal portion 321 is connected with downward distributed spike-shaped damaged members 331 and hook-shaped damaged members 332 at the fluid inlet 101 and the inner space S1 of the fluid inlet is detected in advance; a disc-shaped intermediate skirt 51 is positioned in guided engagement with the sleeve inner surface 42 in the sleeve inner cavity 40; the downward connecting rod 54 of the disc-shaped intermediate body 5 is integrated with the damaged body connecting end 31, and the connecting rod 54 can drive the damaged body 3 to move up and down; the horizontal part 321 of the free end 32 of the damaged body 3 is positioned below the ribs 43 in the opening 403 below the sleeve, the columnar connecting rod 54 penetrates through the opening 403 below the sleeve, the upper surface 431 of the ribs of the sleeve is propped against the lower end of the pressure spring 7 which helps the position of the cystic elastic body 2 to be fully restored after the expansion is released, the upper end of the pressure spring 7 is propped against the lower surface 52 of the disc-shaped intermediate body 5, fig. 8A shows the state that the pressure spring 7 is stretched before the expansion of the free part 22 of the cystic elastic body, and the flushing hole 030 is arranged on the wall 0 of the conduit between the two fluid inlets 101; as shown in fig. 8C, the elastic body free part 22 expands and deforms to push the disc-shaped intermediate body 5 to move downwards along with the damaged body 3, the upward jacket part 323 of the damaged body 3 slides on the outer surface 02 of the catheter wall or moves close to the outer surface 02 of the catheter wall, the outer surface 02 of the catheter wall reliably guides the damaged body, the pressure spring 7 is compressed, elastic potential energy is reserved, a plurality of cutting holes 3210, horizontal parts 321 spike-shaped damaged members 331 and hook-shaped damaged members 332 on the damaged body 3 act on blood clots M to damage the blood clots, the flushing holes 030 spray normal saline for synchronous flushing, the pressure spring 7 is not pressed any more when the fluid filling of the elastic body free part 22 is released, the elastic potential energy releases to push the disc-shaped intermediate body 5 to reset upwards, the state of the pressure spring 7 is restored as shown in fig. 8A, and the blood clots M are finally broken locally into a plurality of fragments with smaller volumes, namely broken parts M1, the fragments are small enough to block the inner cavity 10 of the catheter, and the blood clots M are easily removed by combining with negative pressure suction.
The wall-attached outer sleeve type structure and the wall-attached inner sleeve type structure of the damaged body 3 play roles in positioning, guiding and saving space aiming at the relative movement of the fluid inlet 101; the non-adherent type destructive body 3 means that the destructive body 3 is in a hanging state directly or indirectly connected with the free part of the cystic elastic body, and does not fully exert the guiding function matched with the catheter wall 0, but has larger freedom degree, can fully utilize the adjacent space S2 of the fluid inlet and does not increase the outer diameter of the catheter.
Corresponding forms can be selected according to different clinical applications, such as abdominal cavity, thoracic cavity and intravesical drainage with larger space, and the disfigurement body 3 is selected to be adhered to the coat; the leading-out of intracranial hematoma is more suitable for adhering to the inner sleeve because the brain tissue is prevented from being damaged; the drainage space in the brain room is smaller and can be selected to be non-adherent.
As shown in fig. 8D, 8E and 8F, the optimization scheme of the fluid inlet 101 is that the fluid inlet 101 is formed by a thin-walled inlet component 45, the fluid inlet 101 is opened on the inlet component 45, the fluid inlet 101 is closer to the inner surface 01 of the catheter wall 0, the wall thickness of the catheter body is 1mm as a reference, the wall thickness of the inlet component 45 is less than 0.2mm, the fluid inlet inner space S1 between the inner edge line L1 and the outer edge line L2 of the fluid inlet 101 is obviously reduced, blood clots M are easier to enter the fluid inlet adjacent space S2, after the water is injected into the elastic body cavity 20, the expansion deformation drives the arc-shaped damage member 337 and the like to cut and damage the blood clots M into a plurality of fragments M1, the hook-shaped damage member 332 is damaged, and the blood clots outside the fluid inlet inner space S1, namely, on the side closer to the outer surface 02 of the catheter wall can be damaged by the arc-shaped damage member 337, and finally cut and damaged into a plurality of fragments; the further conduit wall 0 at the periphery of the inlet member 45 narrows gradually towards the fluid inlet 101 to form a bevel 021, i.e. the thin-walled fluid inlet 101 forms an enlarged opening out of the conduit lumen 10 for facilitating the entry of larger blood clots M.
Example 9:
as shown in fig. 9A, 9B and 9C, in the fluid inlet upper space S3, the elastic body connecting portion 21 is in sealing connection with the inner surface 1111 of the tip component, the elastic body free portion 22 wraps the downward protrusion 1113 of the tip component 111, no passage is provided in the protrusion 1113, the protrusion 1113 is located in the elastic body cavity 20, the elastic body free portion 22 is provided with a downward boss 222 facing the catheter cavity 10, the distal end 221 of the elastic body free portion is the end of the boss 222, the damaged body connecting end 31 is connected with the boss 222 to enable the damaged body 3 and the elastic body free portion 22 to synchronously move back, the damaged body free end 32 is provided with a sharp tooth-shaped damaged member 335 facing the fluid inlet 101 formed on the thin-wall inlet component 45, the hollow boss 222 is shown in this example, a bridge pipe 003 is connected in the boss hollow 2220, the other end of the bridge pipe 003 is in butt joint with the elastic body passage 00 in the catheter wall 0, and the bridge pipe cavity 0030 is in fluid communication with the elastic body cavity 20 and the elastic body passage 00; the communication structure of the inner cavity 20 of the cystic elastic body is opposite to the direction of the previous embodiment, but is easy to produce and manufacture; FIG. 9B shows the bridge tube lumen 0030 filling the balloon elastomer lumen 20 with gas, the boss 222 driving the lesion body 3 to move downward when the balloon elastomer free portion 22 is inflated, the bridge tube 003 being compressed and bent, arrows indicating the direction of the gas flow;
It has been found by experiment that when the blood clot M completely covers the fluid inlet 101 with smooth outer surface, suction of the blood clot portion into the fluid inlet adjacent space S2 is difficult even if negative pressure suction of more than-100 mm Hg is started, and in order to prevent such an event to the greatest extent, as shown in fig. 9C, the edge of the fluid inlet 101 is in a zigzag shape, preferably in a zigzag shape with high and low fluctuation, and even if the fluid inlet 101 is covered by the blood clot M, water flows can pass through the plurality of zigzag gaps 1012, and especially in the negative pressure suction state, the water flows in the zigzag gaps 1012 can drive the blood clot M to be locally displaced to the fluid inlet adjacent space S2, so that the damage member 33 can better play a role.
Example 10:
as shown in fig. 10A, 10B and 10C, the connecting portion 21 of the elastic balloon 2 is located on a downward hollow protruding portion 1112 on the inner surface 1111 of the tip member, the protruding portion 1112 is located in the inner cavity 20 of the elastic balloon, and the inner passage 1110 of the tip member 111 is connected to the passage 00 of the elastic balloon via a communication hole 001; the greatest difference from the previous embodiment is: the radial distribution of the fluid inlets 101, that is, the radial dimension of the fluid inlets 101 is larger than the axial dimension, the axial length of the fluid inlets 101 is shortened under the same area, the stroke of the damaged body is also shortened synchronously, the expansion degree of the free part 22 of the elastic body can be reduced, and the user can save more labor when pressing the power body 6 (not shown in the figure); the radial distribution of the fluid inlet 101 radians is increased compared with that of the radial distribution, so that the blood clot M is easier to be detected into the adjacent space S2 of the fluid inlet when the negative pressure is started; meanwhile, a flushing hole 030 formed in the flushing passage 03 faces the fluid inlet 101; to prevent the sharp, dentate, destructive element 335 from accidentally damaging the flexible catheter wall 0, an arcuate guard 004 is inserted around the catheter lumen 10 below the fluid inlet 101, as shown in fig. 10B, the guard 004 is made of a hard material, preferably metal, and the guard 004 can abut against the distal end of the dentate destructive element 335 when the balloon elastomer free portion 22 is inflated, limiting the travel of the dentate destructive element 335, and protecting the flexible catheter wall 0 from the sharp, dentate destructive element 335.
Example 11:
as shown in fig. 11A and 11B, this example illustrates that the non-cystic elastic body p2 located in the fluid inlet upper space S3, the non-cystic elastic body connecting portion p21 is connected with the inner surface 1111 of the top end member, the non-cystic elastic body free portion p22 can be deformed and displaced by fluid driving, the air flow from the cystic elastic body passage 00 is pressed to the non-cystic elastic body free portion upper end surface p223 through the inner passage 1110 of the top end member 111 and the communication hole 001, the non-cystic elastic body upper gap S30 is enlarged in volume, the non-cystic elastic body free portion p22 is pushed to deform so as to move down the central column p222 connected with the non-cystic elastic body free portion p22, the columnar gap p20 between the non-cystic elastic body free portion p22 and the central column p222 is reduced, the destructive body 3 connected with the central column p222 is driven to move down synchronously, the destructive member 33 touches the fluid inlet adjacent space S2, the central column end p221 faces the catheter inner cavity 10, and the arrow indicates the direction of air flow; the non-cystic elastic body can be provided in other shapes such as mushroom shape, nail shape, umbrella shape, film shape, etc.
Example 12:
12A, 12B, 12C and 12D, the biggest difference between the above embodiments is that in the area of the catheter lumen 10 adjacent to the fluid inlet 101, that is, the fluid inlet upper space S3 and/or the fluid inlet adjacent space S2 is provided with an elastomer 9 which is easy to deform after being pulled, and the elastomer connecting part 91 is fixed in the fluid inlet upper space S3 and/or the fluid inlet adjacent space S2, in this example, the elastomer connecting part 91 is sleeved on and tightly connected with a downward hollow protruding part 1112 on the inner surface 1111 of the top end part; the elastic body 9 is made of elastic materials into a strip shape, a tubular shape and the like, and can also be formed by tension springs, the elastic body 9 needs to be matched with the damage body 3 and the traction body D in the scheme, the damage body 3 can be driven by the elastic body free part 92 to displace, the connecting end 31 of the damage body 3 is directly or indirectly contacted with the elastic body free part 92, in the embodiment, the connecting end 31 of the damage body 3 wraps the sphere 921 at the far end of the elastic body free part 92, and the free end 32 of the damage body 3 is provided with a sharp damage member 33; the main body of the traction body D is in a thin wire shape, one end of the traction body D, which is positioned in the inner cavity 10 of the catheter, is directly or indirectly connected with the free part 92 of the elastic body 9, and the drawing shows that the traction body D is connected with the connecting end 31 of the damage body 3; the other end of the traction body D is positioned outside the catheter inner cavity 10, a traction body passage 170 penetrating through a traction body side branch 17 of the catheter tail 13 penetrates out of a traction body passage opening 171 and is connected with a handle D1, the traction body D is pulled by the handle D1 to enable the elastic body free part 92 to deform and be elongated, the elastic body free part 92 is retracted due to self restoration capacity after loosening and traction, the repeated operation is carried out so as to drive a damage member 33 on the free end 32 of the damage body 3 to move at the fluid inlet 101, blood clots M or other types of tissue masses blocked at the fluid inlet 101 are broken through repeated cutting, puncturing and other actions, a large number of broken parts M1 are obviously reduced due to the external size and do not continuously block the fluid inlet 101, and the damage member 33 is more easily discharged out of the body through the catheter inner cavity 10 by combining negative pressure suction and flushing; the portion of the traction body D located in the catheter lumen 10 can squeeze the broken portion M1 during movement to change its position so as to be more easily flushed and sucked outside the body under negative pressure, similar to the principle of dredging a sewer line by stirring with a wire in daily life.
As shown in fig. 12D, in order to prevent the liquid from overflowing through the opening 171 of the traction body side branch passage, the traction body side branch passage 170 is provided with a hollow sealing body D2, the traction body D passes through the sealing body D2, in order to further avoid the liquid from overflowing, a flexible pouch D3 is provided between the handle D1 and the traction body side branch 17, the flexible pouch D30 seals the opening 171 of the traction body side branch passage in the flexible pouch D30 by isolating the flexible pouch D30 from the outside, the flexible pouch D3 may be bellows-shaped, and may also limit the traction body D, i.e. prevent the movement of the handle D1 when the flexible pouch D3 extends to the maximum.
Example 13:
as shown in fig. 13A, unlike in embodiment 12, the traction body D is connected with a synchronous damage body D4 at the position of the fluid inlet adjacent space S2, the synchronous damage body connecting portion D41 is tightly connected with the traction body at the position, the free portion D42 of the synchronous damage body is in hollow-out sheet-shaped horizontal extension, a toothed damage member D43 is arranged below the free portion D42 of the synchronous damage body, the toothed damage member D43 can be driven by the traction body to move up and down to cut and damage tissue lumps in the fluid inlet adjacent space S2 and the fluid inlet inner space S1, the toothed damage member D43 can be partially extended to the fluid inlet inner space S1, and the movement track of the synchronous damage body D4 is better controlled by combining the guiding function of the sleeve 4 and the limiting function of the lower surface 432 of the sleeve rib; the hollow area D421 of the free body portion D42 is damaged synchronously, and the sharp edge D422 of the hollow area D can also cut and damage the tissue mass such as the passing blood clot M.
As shown in fig. 13B, in order to accurately determine the movement degree of the traction body D in vitro, the traction body side branch 17 is at least partially transparent and has a scale 172 thereon, and the traction body D in the traction body side branch passage 170 has a corresponding viewing mark D5 which is easily visible.
Fig. 13C shows the present invention used to clear an intracranial subdural hematoma MM which presses the ipsilateral brain tissue N1 to significantly reduce the volume of the patient' S lateral ventricle N0, the catheter head 11 is partially passed through the skull N into the cranium by conventional operation, negative pressure is activated and liquid is injected through the flushing hole 030 by the flushing channel 03 while the traction body D is pulled/released, the toothed destruction member D43 on the synchronous destruction body D4 is repeatedly driven to push and/or suck the intracranial pressure into the blood clot M in the fluid inlet adjacent space S2 to cut and break the blood clot M and then is discharged out of the body through the catheter lumen 10, the connected negative pressure is not lower than the perfusion pressure and the operation is kept stable, so that the subdural hematoma MM can be gradually cleared, preferably by the real-time monitoring of the imaging means, such as operation under CT guidance.
The blockage eliminating medical catheter can be specifically applied to catheters, biliary tract drainage tubes, stomach tubes, thoracic drainage tubes, abdominal cavity drainage tubes, cerebrospinal fluid drainage tubes and the like, can also act on veins and arteries to remove thrombus, and is used for clinical scenes such as intracranial hemorrhage, subdural hematoma, epidural hematoma, uterine cavity bleeding, blood clot cleaning of abdominal cavity bleeding and the like.
The invention obviously reduces the steps of clinical operation, lightens the workload of medical staff, and has very ideal effects of eliminating the blockage of the catheter and eliminating the blockage; in vitro simulation of catheter blockage experiments in the bladder: the total volume is 30 milliliters, a plurality of blood clots with a single volume of about 1 milliliter are placed into the inner cavity of the artificial bladder, and the blood clots are completely removed out of the catheter within half an hour.
Claims (16)
1. The main body of the hollow catheter (1) consists of a catheter head (11), a middle part (12) and a tail part (13), wherein the catheter head (11) is provided with a fluid inlet (101), the tail part (13) is provided with a fluid outlet (102), the fluid inlet (101) and the fluid outlet (102) are communicated with a catheter inner cavity (10), and the hollow catheter (1) is characterized in that a bag-shaped elastic body (2) or a non-bag-shaped elastic body (p 2) which can be displaced after being pressed by fluid and a damage body (3) driven by the elastic body are arranged in the area, adjacent to the fluid inlet (101), of the catheter inner cavity (10), namely a fluid inlet upper space (S3) and/or a fluid inlet adjacent space (S2); the elastic body comprises an inflatable and deformable cystic elastic body (2) after filling, and is composed of a cystic elastic body connecting part (21) and a cystic elastic body free part (22), wherein a cystic elastic body inner cavity (20) is in fluid communication with a cystic elastic body passage (00) arranged on a catheter wall (0) through a communication hole (001); the distal end (221) of the balloon elastomer free portion is directed towards the fluid inlet (101) or the fluid inlet adjacent space (S2); the damaged body (3) can be driven by the expanded elastic body free part (22) to displace, the connecting end (31) of the damaged body (3) is directly or indirectly contacted with the elastic body free part (22), a sharp damaged component (33) is arranged on the free end (32) of the damaged body (3), the expansion deformation of the elastic body free part (22) can drive the damaged component (33) to move at the fluid inlet (101), blood clots (M) or other tissue masses blocked at the fluid inlet (101) are broken through repeated cutting and/or puncturing actions, the broken part (M1) is obviously reduced because of the external size and does not continuously block the fluid inlet (101), and the blood clots are easier to be discharged out of the body through the inner cavity (10) of the catheter.
2. The occlusion-removing medical catheter set forth in claim 1, wherein the destructive element (33) is in the form of one or more of a sharp spike (331), hook (332), sickle (333), blade (334), tooth (335), anchor (336).
3. The occlusion-removing medical catheter of claim 1, wherein the balloon elastomer free portion (22) is in the form of one or more of bellows, eccentric, bifurcated at a distal point, partially thin walled at a distal point, through-hole at a distal point, wall-attached, suspended.
4. A medical catheter according to claim 1, characterized in that a thin walled sleeve (4) with a completely open or partially closed top is nested at least in the fluid inlet upper space (S3), the balloon elastomer free portion (22) being wholly or partly located in the sleeve lumen (40), the sleeve lumen (40) communicating with the fluid inlet proximal space (S2); the fluid inlet (101) is arranged on the conduit wall (0) or directly arranged on the sleeve (4).
5. A medical catheter with occlusion elimination according to any of the claims 1-4, characterized in that the free part (22) of the cystic elastic body is in dynamic fit with the lesion (3) directly or through the disc-shaped intermediate body (5); the disc-shaped intermediate body (5) is provided with an upward and/or downward skirt (51), and the outer surface (53) of the disc-shaped intermediate body skirt is in sliding contact with the inner surface of the upper space (S3) of the fluid inlet.
6. The occlusion-removing medical catheter set forth in claim 1, further comprising a hollow power body (6), the power body lumen (60) being in communication with the cystic elastic force path (00); after being pressed, the fluid in the power body cavity (60) enters the cystic elastic body cavity (20) through the cystic elastic body passage (00) directly or through the bridging tube (003).
7. A medical catheter according to claim 1, characterized in that the balloon elastomer free portion (22) is provided with a lesion (3) outside, the lesion (3) being in one or more of an adherent outer sheath, an adherent inner sheath, and a non-adherent.
8. A medical catheter with occlusion elimination according to claim 1, characterized in that the fluid inlet (101) is structured as: the wall thickness is less than 50% of the average thickness of the conduit wall (0), the fluid inlets (101) are distributed radially, the edges of the fluid inlets (101) are in the shape of a zigzag line (1011), and one or more of the protective sheets (004) are arranged in the conduit cavity (10) below the fluid inlets (101).
9. The medical catheter with the blockage eliminating function according to claim 1, further comprising a booster body (7) for helping the position of the cystic elastic body (2) to be fully restored after the expansion is released, wherein the booster body (7) is one or more of tension springs and compression springs with different shapes, and the booster body (7) directly or indirectly acts on the cystic elastic body (2) and/or the damage body (3).
10. The occlusion-removing medical catheter according to claim 1, further comprising one or more flushing passages (03) arranged along the catheter wall (0), the flushing passages (03) being in communication with the fluid inlet headspace (S3) and/or the fluid inlet proximal space (S2) through flushing holes (030).
11. The occlusion-removing medical catheter of claim 1, further comprising a negative pressure balloon (8) having an elastic restoring force, the negative pressure balloon lumen (80) being in communication with the catheter lumen (10).
12. The occlusion-removing medical catheter of claim 6, further comprising a negative pressure balloon (8) having an elastic restoring force, wherein the negative pressure balloon lumen (80) is in communication with the catheter lumen (10), and wherein the balloon-like power body (6) is positioned adjacent to or integrally fused with the negative pressure balloon (8) for facilitating one-handed operation.
13. The medical catheter with the function of eliminating blockage is characterized in that an elastomer (9) which is easy to deform after being pulled is arranged in an adjacent fluid inlet (101) area, namely a fluid inlet upper space (S3) and/or a fluid inlet adjacent space (S2) of the catheter inner cavity (10), and an elastomer connecting part (91) is fixed in the fluid inlet upper space (S3) and/or the fluid inlet adjacent space (S2); the novel energy-saving device also comprises a damage body (3) and a traction body (D), wherein the damage body (3) can be driven by the elastic body free part (92) to displace, the connecting end (31) of the damage body (3) is directly or indirectly contacted with the elastic body free part (92), the free end (32) of the damage body (3) is provided with a sharp damage member (33), and the damage body (3) is in one or more of an adherence outer sleeve type, an adherence inner sleeve type and a non-adherence type; the traction body (D) is in a thin wire shape, one end of the traction body is directly or indirectly connected with the free elastomer part (92), the other end of the traction body is positioned outside the catheter inner cavity (10), the traction body (D) is pulled to deform the free elastomer part (92), so that the damage component (33) is driven to move at the fluid inlet (101), blood clots (M) or other types of tissue masses blocked at the fluid inlet (101) are broken, the broken part (M1) is obviously reduced in external size and cannot continuously block the fluid inlet (101), and the blood clots are easier to be discharged out of the body through the catheter inner cavity (10).
14. The occlusion elimination medical catheter according to claim 13, wherein the traction body (D) is connected with a synchronous damage body (D4) at the position of the fluid inlet adjacent space (S2), the synchronous damage body connecting part (D41) is tightly connected with the traction body (D), the thin-wall synchronous damage body free part (D42) horizontally extends in a hollowed-out shape, a damage component (D43) is arranged below the synchronous damage body free part (D42), and the damage component (D43) can be driven by the traction body to move up and down to cut and damage tissue masses such as blood clots (M) in the fluid inlet adjacent space (S2) and/or the fluid inlet inner space (S1).
15. The occlusion-removing medical catheter of claim 13, further comprising one or more of an irrigation pathway (03), a thin-walled fluid inlet (101), a sleeve (4), a negative pressure balloon (8); a flushing passage (03) provided on the catheter wall (0) communicates with the fluid inlet upper space (S3) and/or the fluid inlet adjacent space (S2) through a flushing hole (030); the wall thickness at the thin-walled fluid inlet (101) is less than 50% of the average thickness of the conduit wall (0); the upper space (S3) of the fluid inlet is nested with a thin-walled sleeve (4) with a completely open top or a partially closed top, all or a part of the elastomer free part (92) is positioned in the inner cavity (40) of the sleeve, and the inner cavity (40) of the sleeve is communicated with the adjacent space (S2) of the fluid inlet; the negative pressure bag (8) has elastic restoring force, and the inner cavity (80) of the negative pressure bag is communicated with the inner cavity (10) of the catheter.
16. The occlusion-removing medical catheter set forth in claim 13, further comprising a retractor side branch (17) connected to the catheter lumen (10), the retractor (D) being threaded out of the retractor side branch access opening (171) and connected to a handle (D1); in order to prevent the liquid from overflowing through the traction body side branch passage opening (171), a hollow sealing body (D2) is arranged in the traction body side branch passage (170) or a flexible bag (D3) is arranged between the handle (D1) and the traction body side branch (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121663.2A CN117717660A (en) | 2024-01-29 | 2024-01-29 | Medical catheter capable of eliminating blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121663.2A CN117717660A (en) | 2024-01-29 | 2024-01-29 | Medical catheter capable of eliminating blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117717660A true CN117717660A (en) | 2024-03-19 |
Family
ID=90207172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410121663.2A Pending CN117717660A (en) | 2024-01-29 | 2024-01-29 | Medical catheter capable of eliminating blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117717660A (en) |
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2024
- 2024-01-29 CN CN202410121663.2A patent/CN117717660A/en active Pending
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