CN113398433A

CN113398433A - Catheter fixing device

Info

Publication number: CN113398433A
Application number: CN202110663634.5A
Authority: CN
Inventors: 吴蕊; 郭连瑞
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-09-17
Anticipated expiration: 2041-06-15
Also published as: CN113398433B

Abstract

The present invention provides a catheter fixing device, comprising: the supporting belt is provided with a first surface and a second surface deviating from the first surface; the self-connecting sheet is partially or completely arranged on the second surface of the supporting belt; wherein one end of the support band is folded back toward the first surface in the bending direction through a slit provided in the support band to form a tube penetration opening, and an extremity fixing opening adjacent to the tube penetration opening is formed in such a manner as to merge with the other end of the support band along a path, wherein at least a part of the path includes a curved traveling direction in which an extending direction of the support band is changed so that the one end of the support band merges with the other end. The medical hose fixing device is provided with the element for resisting the excessive binding force, so that the medical hose can be fixed without influence.

Description

Catheter fixing device

Technical Field

The invention relates to the field of medical instruments, in particular to a catheter fixing device.

Background

Vascular surgery is mainly aimed at the prevention, diagnosis and treatment of peripheral vascular diseases other than cerebrovascular and cardiovascular diseases. After vascular surgery, a patient often carries out urinary catheter implantation outside the body, and in a few surgeries for designing the heart, the artery and other parts, the vein, the artery and other external blood vessels are bridged to cause an important pipeline to exist outside the body. When a patient is cured after operation, the pipeline placed outside the body is always required to be kept static and unchanged in position so as to ensure ordered blood flow in the body or no damage to the bladder.

Chinese patent No. CN208838837U provides a medical tube fixing sticker, which comprises a prefabricated body, wherein the prefabricated body comprises a nose fixing part and a face fixing part, and the nose fixing part and the face fixing part can be separated from each other; the nose fixing part comprises a pasting part for pasting the nose and a fixing part for fixing the medical pipeline; the face fixing part is used for adhering the medical pipeline near the face. The device is pasted fixedly through the shape that matches the face, and it only is applied to the face to carry out the pipeline through the mode of parcel pipeline and fix. Further, chinese patent No. CN109621158A provides a catheter fixer, which includes a base and a wing fixing portion, wherein the base includes an adhesion surface for adhering the base to the skin and a fixing surface for detachably fixing the wing to the fixing surface. The device carries out the pipeline through the centre gripping pipeline and fixes, and carry out the fixed of pipeline position through pasting in human surperficial arbitrary position, but the connected mode of pasting can cause very big damage to human skin, therefore, fixing to the pipeline among the prior art adopts more to encircle the bundling formula, and carry out the tube fastening through the magic subsides of reverse side, but when carrying out the tube bundling or centre gripping fixed, because the dynamics of adjusting the degree and totally relying on the hand is taut, it probably tightens to hose such as ureter, peripheral vein takeover and leads to hose partial region diameter to diminish, cause the circulation to be difficult, the fixed system for fixing medical products that chinese patent publication No. CN108348731A discloses realizes the fixed of block through pasting the base that pastes the human body, the fin and the hinge that the horizontal width of the free distal part that fixed proximal part moved between open position and closed position is less than the horizontal width of paster and is less than the horizontal width of fin realizes the block and fixes The catheter is not bound and fixed to the body in a sticking mode, and the possibility that the catheter moves along the patch exists in a mode that the fin is clamped and fixed to the catheter, so that the catheter is not fixed stably. Therefore, based on the prior art, there is a need to design a catheter fixing device to solve the above problems by adding a design capable of resisting an excessive pressure generated when binding a catheter.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a catheter fixing device, which comprises: the supporting belt is provided with a first surface and a second surface deviating from the first surface; the self-connecting sheet is partially or completely arranged on the second surface of the supporting belt; wherein one end of the support band is folded back toward the first surface in the bending direction through a slit provided in the support band to form a tube penetration opening, and an extremity fixing opening adjacent to the tube penetration opening is formed in such a manner as to merge with the other end of the support band along a path, wherein at least a part of the path includes a curved traveling direction in which an extending direction of the support band is changed so that the one end of the support band merges with the other end.

The technical scheme has the advantages that: through the self-surrounding of the supporting belt, a double-ring structure is formed. The two connected rings can wrap the catheter extremity and are fixed on the catheter and the extremity in a wrapping or binding mode respectively. The relative position fixation is formed by one connecting point based on two rings, so that the catheter can be fixed relative to the limb binding position. The size control of the first loop is controlled by the portion of the support band forming the second loop based on the fact that the first loop for binding the catheter and the binding band used for binding the second loop for the extremity are integral, i.e., the support band, and the first loop preferentially loops over the second loop. When one end of the supporting belt passes through the split to form the first ring into a ring, the two ends of the supporting belt which form the cross can change the diameter of the first ring based on the approaching or separating of the two ends so as to adjust the tightness degree of the first ring formed by the supporting belt to wrap the catheter. After the first ring is properly adjusted, the limb end can be encircled by the two ends, and the tightness of the second ring can be adjusted at the joint of the two ends. The wrapping and relative position fixing of the double column, namely the catheter and the limb end, are realized through the simple threading operation of the integrated supporting belt. Preferably, the support strip is based on the fact that it is provided with a face that interferes with the catheter, a face that interferes with the binding extremity, a face that faces outwardly away from the catheter and a face that faces outwardly and possibly interferes with another extremity during use. The surface of the conduit and the surface of the binding limb are the surfaces with the highest friction coefficient on the supporting belt. The friction coefficient against the face of the catheter is highest to increase the fastening ability of the bundled catheter, due to the possible damage to the skin by the face of the bundled limb. The surface facing outwards away from the catheter is immediately adjacent to the surface abutting against the binding limb, so that the surface abutting against the catheter as a region of high coefficient of friction can be changed to a lower coefficient of friction in a transition with a gradually decreasing coefficient of friction, the transition region can be the intersection. When the support belt is engaged by the slit, the support belt passes through the low friction region too quickly, but when the support belt enters the high friction region, the support belt may be caught by the action of friction, and the support belt may not be smoothly tensioned at both ends of the intersection. The transition region enables the intersection formed by the two ends of the support belt to slide smoothly based on the gradual change of the friction coefficient. The surface of the interference conduit and the surface facing outwards that may interfere with the other extremity are located at one side and the two surfaces are in close proximity, so that the surface of the interference conduit arranged to have a high coefficient of friction can be tapered to transition to the surface facing outwards that may interfere with the other extremity. The well-defined support band enables one end to pass smoothly through the split to form a double loop and prevents the support band from becoming blocked at the split and becoming unable to move at the split while the first loop is being adjusted.

According to a preferred embodiment, the fastening device comprises a stop collar arranged on the second side of the support band, the stop collar comprising a fastening flap and a free flap, the free flap being able to change its position relative to the support carrier in such a way that a first separating end arranged thereon engages with a second separating end of the free flap, so as to move towards, away from or into contact with the fastening flap, in order to change the opening and closing state of the stop collar. The first separating end and the second separating end can move along the buckling channel in relative positions to adjust the diameter of the limiting ring. The stop collar is rigid relative to the support band.

The technical scheme has the advantages that: when the support band is formed into a first loop and sleeved over the catheter, adjusting the ends of the support band to perform the catheter binding may cause the first loop to over wrap the catheter, thereby deforming the catheter and reducing its diameter. The deformation of the catheter may cause changes in the flow rate and quantity of the fluid flowing through the catheter, thereby affecting the use of the patient using the catheter. Based on this, a stop collar is designed to protect the catheter from over-wrapping. Preferably, the stop collar is detachably connectable to the support strap, i.e. the support strap is provided with a loop or strap which allows the stop collar to secure or free the petals to hook up the stop collar to the support strap. The spacing ring is provided with the internal diameter that matches the pipe size based on the diameter size of pipe in order to realize the parcel and contradict the purpose of pipe but not extrusion pipe. When the supporting belt is wrapped, the rigidity of the limiting ring higher than that of the supporting belt can generate a resisting effect and the supporting belt is not deformed, so that the catheter wrapped by the limiting ring is protected.

According to a preferred embodiment, the opposing faces of the first and second separating ends which are adjacent to each other are provided with a catching groove which engages with each other and which comprises a base and spaced projections provided on one side of the base, wherein a first and a second side of the projections extending transversely to the longitudinal direction of the support strip can be curved. The stop collar is transversely disposed on the second side of the support strap relative to the longitudinal extent of the support strap.

The technical scheme has the advantages that: the stop collar can be replaced, but it can also be adjusted to match the wrapped catheter by adjusting its diameter. The limiting ring is provided with a slidable buckling channel, and the first separating end and the second separating end move relatively to realize the enlargement or reduction of the limiting ring. Preferably, the buckling channel can be provided with protrusions with different distances, the distances among the different strip-shaped protrusions can be matched with the limiting rings with different diameters, the limiting rings with different diameters correspond to the guide pipes with different diameters, and therefore the limiting rings can be applied to the guide pipes with various diameters.

According to a preferred embodiment, the support strap is provided with a strap folded back in the length direction to form a through opening, and the fixed end of the stop collar is clamped in the strap to achieve a relative position fixation of the stop collar and the support strap.

According to a preferred embodiment, the raceway comprises spaced projections and spaced gaps provided between the projections capable of receiving opposing projections, the projections of the first separating end engage the spaced gaps between the projections of the second separating end, the projections of the second separating end engage the spaced gaps between the projections of the first separating end to form a staggered engagement similar to a gear engagement to hold the first separating end and the second separating end fixed, wherein the first side and the second side of the projections extending transversely to the longitudinal direction of the support belt can be curved surfaces having a curvature. The volume of the spacing gap is not larger than that of the protrusion, so that the protrusion and the opposite protrusion can form point-contact type extrusion when entering the spacing gap, and the protrusion can generate force transverse to the extension direction of the button channel, so that the connection tightness of the protrusion transverse to the extension direction of the button channel is improved.

The technical scheme has the advantages that: compared with prismatic protrusions in the prior art, the protrusions arranged on the buckling channel are arc-shaped, and point-contact extrusion is generated instead of full-area contact when the protrusions of the buckling channel are inserted into opposite interval gaps in a staggered mode. When the force is applied in the transverse direction and the longitudinal extension direction of the supporting belt, the first separating end and the second separating end can be separated in a labor-saving mode compared with full-area contact based on small friction force generated by point contact type extrusion. The projection of the arcuate edge line enables the path of travel of the first and second spaced apart ends in the longitudinal extent of the support belt to be undulating rather than dog-legged during relative movement of the first and second spaced apart ends, thereby providing a degree of cushioning for the separation and approach of the first and second spaced apart ends.

According to a preferred embodiment, the support band can be connected directly or indirectly to the body by means of self-connecting tabs arranged at its two ends, wherein the fixing device is further provided with a complementary body connecting element which can be connected to the binding band by means of gluing or binding as an intermediate medium. The fastening device further comprises a patch capable of being provided with an adhesive on a first surface for attachment to the body, a second surface of the patch facing away from the first surface being capable of being connected to one end of the second side of the support strip, and a connection area capable of being connected to the second surface of the patch being provided on the first side of the support strip based on the fastening action of the other end of the second side of the support strip to the catheter.

The technical scheme has the advantages that: the direct limb tying of the second ring may have an effect on the diameter of the first ring, and therefore the placement of the patch or tie strip may be fixed at any location on the body and then connected to the support band, thereby eliminating the need to adjust the second ring or the support bands forming the second ring and only connecting the support band portions forming the first ring to the intermediate carrier. The intermediate carrier can be in the form of a patch or a strap.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a state-showing view of the support belt;

FIG. 3 is a block diagram of one embodiment of a stop collar;

FIG. 4 is a top view of the support belt;

FIG. 5 is a cross-sectional view of one embodiment of a raceway;

FIG. 6 is a cross-sectional view of another embodiment of a raceway;

figure 7 is a cross-sectional view of one embodiment of a hollow raceway.

Reference symbols of the drawings

100: support belt 110: breach

120: first side 130: second surface

140: first end 150: second end

160: pipe penetration port 170: limb end fixing port

200: the limiting ring 210: fixed flap

211: first separation end 220: free valve

221: second separation end 230: connecting shaft

240: base 250: protrusion

251: top 252: bottom part

253: first side surface 254: second side surface

260: spacing gap 300: self-connecting sheet

400: the conduit 270: buckle path

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

In the prior art, two fixing modes are provided for catheters, particularly urinary catheters, one mode is temporary use and fixing, namely, medical workers use a high-lift platform method or an M-shaped adhesive tape wrapping method to carry out pipeline pasting and position limitation, and then redundant pasting areas are pasted on a human body to realize catheter fixing; the other is that the binding band is bound on the leg or other parts, then the hose is stuck on the binding band by an M-shaped binding mode, and the binding band are connected by magic tape.

This binding method has some problems with respect to the fixation of the catheter 400. The M-shaped binding means is a separate device, and the catheter 400 needs to be fixed and then adhered to the binding band, but the adhesion area provided on the outer surface of the binding band may damage the skin of other parts that may contact the binding part, and the M-shaped binding means is easy to cause the user to fail to achieve a good wrapping and fixing effect when wrapping the catheter 400 due to its short and small ends.

Fig. 1-2 illustrate a catheter 400 fixation device according to one embodiment of the present invention, comprising a support band 100, a self-attaching tab 300. Support strip 100 is provided with a first face 120 and a second face 130 facing away from first face 120. The self-attaching tab 300 is partially or entirely disposed on the second side 130 of the support strip 100. One end of the support band 100 is folded back toward the first surface 120 in the bending direction through the slit 110 provided in the support band 100 to form a tube insertion opening 160. One end of the support band 100 can be formed into the extremity fixing port 170 adjacent to the tube penetration port 160 in such a manner that it merges with the other end of the support band 100 along a path, wherein at least a part of the path includes a curved traveling direction in which the extending direction of the support band 100 is changed so that the one end of the support band 100 merges with the other end. One end of the support belt 100 extends along a half M-shaped path, and forms an upper and a lower connecting ports by passing through the slit 110 and then converging with the other end, and the two ports are respectively used for sleeving the catheter 400 and the limb end, so that the connection and the relative position fixation of the catheter 400 and the limb end are realized.

The catheter 400 is fixed by surrounding the catheter 400 and tightening the surface of the surrounding catheter 400 to fix the position of the catheter 400 by means of the constraint and friction between the surrounding catheter and the surrounding catheter. The medical catheter 400, such as a tracheal cannula, a nasogastric tube, a ureter, a venous indwelling needle, etc., is mostly made of a flexible material. The medical catheter 400 is easily over-wrapped by the securing band during the bundling process, thereby causing the hose to deform. The diameter of the deformed hose changes, so that the flow speed and the flow quantity of the liquid introduced and discharged are changed. For some extracorporeal external tubes such as an infusion tube, the change of the flow rate can cause the liquid input speed to be too fast, and the negative effect is generated on the human body. Based on the problem that the hose deforms when being fixed, the invention designs the catheter fixing device, and the fixing device is provided with an element for resisting the excessive binding force to realize the non-influence fixing of the medical hose.

A catheter securement device further includes a stop collar 200 disposed on a surface of the support band 100. The support band 100 is provided with at least two self-connecting tabs 300 on the same side of the stop collar 200 and on opposite sides of the stop collar 200, as shown in figure 3. The support band 100 is provided with a split 110 between the self-coupling tab 300 and the stop collar 200 in the direction of the first end 140. The second end 150 of the support band 100 can be passed through the slit 110 such that the support band 100 in a loop shape provides a stop for the catheter 400, which is fixed in position relative to the support band 100 by the stop collar 200. The second end of the support belt 100 is threaded through the split 110, the first end 140 and the second end 150 form a cross, and then the first end 140 and the second end 150 form a second loop around the extremity or other body part of the patient, while the first end 140 and the second end 150 are close or joined, such that the support belt 100 forms a double loop like an 8-letter. The double loop shape of support belt 100 comprises an upper extremity anchoring opening 170 and a lower half of tube penetration opening 160. The extremity fixing port 170 is used to wrap the catheter 400 to fix the catheter 400, and the tube penetration port 160 is used to surround the user's body for fixing the extremity fixing port 170 in position relative to the user's body. The size of the diameter of the extremity fixing port 170 can be controlled by the tube through-hole 160 based on the tube through-hole 160 being located at the end of the path of the change in shape of the support band 100. The support band 100 comprises a first face 120 located inside the extremity fixation port 170 and outside the tube through-opening 160 and a second face 130 facing away from the outside of the extremity fixation port 170 and inside the tube through-opening 160. After support band 100 forms a complete double loop structure, first end 140 and second end 150 are provided with connectors to enable tube penetration 160 to be closed. The second face 130 of the support belt 100 is partially (at both ends) or entirely provided with a self-attaching sheet 300 capable of being directly or indirectly attached to the human body. When the support belt 100 is fastened and fixed to a leg or an elbow, the first surface 120 may be made of a soft and smooth material, and when the leg or the arm on which the support belt 100 is provided rubs against the body, the first surface 120 of the support belt 100 may be prevented from being damaged by a portion close to the support belt 100, for example, a left leg of the support belt 100 may be easily close to a right leg. The supporting belt 100 is cotton yarn or other elastic belt body, and the supporting belt 100 has a length at least capable of matching the circumference of the waist, the extremities or the head of the human body. Preferably, the support belt 100 is provided with length adjustment elements by means of which the setting of the free length of the support belt 100 is performed. The length adjustment element can be a square ring adjustment buckle. Preferably, the first surface 120 of the first end 140 and the second surface 130 of the second end 150 are respectively provided with magic glues enabling the two ends to be in interference connection. As shown in FIG. 4, which illustrates the manner in which the catheter 400 traverses the stop collar 200, the stop collar 200 is transversely oriented on the second face 130 of the support belt 100 relative to the longitudinally extending line of the support belt 100.

According to a preferred embodiment, the stop collar 200 is rigid relative to the support strap 100, based on the ability of the stop collar 200 to resist the wrapping action of the support strap 100. The stop collar 200 can be undeformed when the support band 100 wraps around the stop collar 200 and compresses the stop collar 200. The diameter of the stop collar 200 is sized to closely abut against but not compress the guide tube 400 after adjustment of the diameter of the stop collar 200 by the keyway 270, thereby securing the guide tube 400 while resisting compression of the guide tube 400 by the support band 100.

According to a preferred embodiment, the support band 100 is provided with a buckle band folded back in the length direction to form a through opening, and the fixed end of the spacing ring 200 is clamped in the buckle band to achieve relative position fixing of the spacing ring 200 and the support band 100. The stop collar 200 can separate the fixed end from the buckle belt based on the separation of the fixed end and the free end, thereby realizing the detachable separation of the stop collar 200 and the support belt 100. The material of the buckle band can be the same as that of the support band 100 or more flexible than that of the support band 100, and both ends of the buckle band can be connected to the surface of the support band 100 in an interference or separation manner.

According to a preferred embodiment, the support belt 100 can be directly or indirectly connected with the human body through self-connecting pieces 300 provided at both ends thereof, wherein the fixing device is further provided with a matching human body connecting piece capable of connecting the support belt by means of pasting or binding as an intermediate medium. Based on the reference of the connection manner in the prior art, the fixing device is also provided with an annular connection base. The connecting base is a binding belt with one surface facing the human body and the other surface departing from the human body and provided with a magic sticky hook surface. After the connection base binds the human body, the support band 100 can be completely or partially wrapped around the connection base to achieve connection with the human body. The second side of the support belt 100 is provided with a roughened surface for partial or complete attachment to the hook surface of the attachment base. The position of the pipe penetration opening 160 can be selected depending on the connection position of the support band 100 on the connection substrate and the position change of the support band 100 as a loop by spinning at the center of the loop.

The retainer ring 200 is provided on the first surface of the support belt 100. In one aspect, the stop collar 200 can secure the position of the catheter 400 by constraining the catheter 400; on the other hand, the stop collar 200 can have a compression resistance when wrapped by the support band 100 based on its shape fixation. The stop collar 200 is adapted to receive the catheter 400. The stop collar 200 comprises a fixed petal 210 and a free petal 220, and the fixed petal 210 and the free petal 220 are combined together to form a complete closed ring. One end of the fixed lobe 210 is connected with the free lobe 220 through the connecting shaft 230, and the free lobe 220 can move parallel to the paper surface by taking the connecting shaft 230 as a moving center. The fixation flap 210 is attached to a first face of the support band 100. The free flap 220 can be changed in position toward, away from or in connection with the fixed flap 210 with respect to the support carrier by engaging the first separation end 211 provided thereon with the second separation end 221 of the free flap 220 to realize a change in the open-close state of the retainer ring 200. The surfaces of the first and second separated ends 211 and 221 that are relatively close to each other are provided with a catching groove 270, and the catching groove 270 of the first separated end 211 and the catching groove 270 of the second separated end 221 are engaged with each other. The channel 270 includes spaced projections 250 and spaced spaces 260 disposed between the projections 250 that can receive the opposing projections 250, as shown in fig. 5. The protrusions 250 of the first separated end 211 engage the spaces 260 between the protrusions 250 of the second separated end 221, and the protrusions 250 of the second separated end 221 engage the spaces 260 between the protrusions 250 of the first separated end 211, forming a staggered engagement similar to a gear engagement manner, maintaining the first separated end 211 and the second separated end 221 fixed, thereby achieving a closed connection of the free flap 220 and the fixed flap 210. Application of a force in a direction generally perpendicular to the extension of the first 211 and second 221 separation ends causes the protrusions 250 to disengage the spacing voids 260, thereby separating the first 211 and second 221 separation ends.

In the prior art, the arrangement of the buckling channel 270 adopts a forward-inclined trapezoidal structural design similar to that of a gear, and the buckling is mainly realized through meshing contact of two opposite faces of the gear. The engagement by full area contact and hooking of the meshing teeth only allows for controlled connection of the two ends in the direction of extension of the raceway 270. Since the force of the hooking action only occurs in the extending direction of the buckle path 270, it cannot protect the connection of the two ends in the direction transverse to the extending direction of the buckle path 270. According to a preferred embodiment, the button channel 270 further comprises a base 240, and the protrusion 250 is disposed on a surface of the base 240. The protrusion 250 is attached to the surface of the support belt 100 by the base 240. The first and

second sides

253, 254 of the protrusion 250 extending transversely to the longitudinal direction of the support belt 100 can be curved with a curvature. The protrusions 250 are bar-shaped cylinders arranged at intervals on the base 240. In a side cross-sectional view of the keyway 270, the first and

second sides

253, 254, shown as projections 250, extending transversely to the longitudinal direction of the support belt 100, are curved surfaces of the outwardly facing projections 250 having a curvature. When the catching grooves 270 of both ends of the support band 100 are close to each other, the protrusions 250 are fitted into the spacing gaps 260 formed by the opposing protrusions 250 at intervals. The first side 253 of the protrusion 250 and the second side 254 of the opposite protrusion 250 form point contact based on the design of the arc surfaces. The point contact between the protrusions 250 makes the contact area thereof smaller, which can generate less resistance when performing the separation of the first and second separated ends 211 and 221, and the smaller contact area can also reduce the abrasion between the engaged protrusions 250. In the engagement process, tight engagement means that there is almost no gap in the entire area contact, and when the size of the retainer ring 200 is changed, there is no direction of application of force, and the first separation end 211 and the second separation end 221 can be separated only by the force of the straight line up and down. The curvature of the first and second sides 253,254 of the protrusion 250 of the present invention is such that the keyway 270 when engaged has a gap between the top and bottom of the protrusion. When the first and second separating ends 211 and 221 are forced to be separated, the protrusion 250 can be inclined based on the force applying direction given by the top and bottom circumferential gaps when the force is applied in any direction, so that the closely contacted first and second separating ends 211 and 221 can be separated with a relatively balanced force.

According to a preferred embodiment, the protrusion 250 can have a certain elasticity. The volume of the space 260 is not larger than that of the protrusion 250, so that the protrusion 250 can form a point contact type press with the opposite protrusion 250 when entering the space 260. The point-contact-type pressed protrusion 250 can prevent the friction force against the separation of the both ends generated by the excessive contact when the both ends are separated. The compression enables the protrusion 250 to create a force transverse to the direction of extension of the button channel 270, thereby increasing its tightness of connection transverse to the direction of extension of the button channel 270.

Most of the protrusions 250 of the related art catching groove 270 are designed to be tooth-shaped, and the tooth surfaces are partially or completely attached to each other, so that a full-touch design is formed. The friction force generated by the contact surface of the protrusion 250 with the full-touch design when the separation ends are separated needs a large force to separate the catching grooves 270 at the two ends. For this reason, the prior art generally arranges the two ends to interfere with each other when applying the buckle path 270. The first and second separating ends 211 and 221 are separated from each other by an external force at both ends, and teeth of the two separating ends are advanced or retreated in directions staggered with each other, thereby achieving adjustment of the length/diameter of the band or ring connected at both ends. When the proper position is reached, the two end gears mesh at the proper teeth and the two ends are based on a structural design to be in close interference in the direction transverse to the extension of the raceway 270 due to the disappearance of the force transverse to the extension of the raceway 270. The prior art raceway 270 is used by applying a force transverse to the direction of extension of the raceway 270, creating a gap at each end that allows the teeth of the raceway 270 to move. As the teeth at both ends move along the opposing berms 270, the sharp tips of the teeth may rub against the opposing berms 270, deforming the teeth after extended use, causing the berms 270 to loosen from engagement with each other. Preferably, the top of the protrusion 250 in the present invention is provided as a concave surface, as shown in fig. 6. When the first and second separating ends 211 and 221 are relatively moved to adjust the inner diameter of the ring, the tops of the protrusions 250 and the opposite protrusions 250 can reduce friction between the tops when colliding based on the concave design thereof.

Further, the protrusion 250 can be a hollow arrangement, as shown in fig. 7. Based on the staggered occlusion mode of the protrusions 250, the invention adds the occlusion mode to facilitate the micro-distance movement of the button way 270, thereby further refining the diameter adjustment range of the stop collar 200. The protrusion 250 can be a circular structure consisting of arcs protruding outward from the protrusion 250, and the top is provided with a channel enabling the hollow portion in the middle to communicate with the outside. The top channel can allow for the arcuate entry of the opposing projections 250. The bent arc-shaped edge of the opposite protrusion 250 can be hooked with the bent arc-shaped edges of the two sides of the protrusion 250, so that the first separation end 211 and the second separation end 221 are connected.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A catheter securement device, comprising:

a support belt (100), the support belt (100) being provided with a first face (120) and a second face (130) facing away from the first face (120);

a self-connecting tab (300), the self-connecting tab (300) being partially or fully provided on the second face (130) of the support strip (100);

wherein one end of the support belt (100) is folded back toward the first surface (120) in the bending direction through a slit (110) provided in the support belt (100) to form a tube penetration opening (160), and a limb end fixing opening (170) adjacent to the tube penetration opening (160) is formed in such a manner as to merge with the other end of the support belt (100) along a path, wherein at least a part of the path includes a curved traveling direction in which the extending direction of the support belt (100) is changed so that the one end of the support belt (100) merges with the other end.

2. The catheter securement device of claim 1, characterized in that the securement device comprises a stop collar (200) disposed on the second face (130) of the support band (100),

the limiting ring (200) comprises a fixed valve (210) and a free valve (220), and the position of the free valve (220) close to, far away from or connected with the fixed valve (210) can be changed relative to the supporting belt (100) in a mode that a second separation end (221) arranged on the free valve and a first separation end (211) of the fixed valve (210) are meshed with each other so as to realize the change of the opening and closing state of the limiting ring (200).

3. Catheter securement device according to claim 1 or 2, characterized in that the stop collar (200) is rigid with respect to the support band (100).

4. Catheter securement device according to one of the preceding claims, characterized in that the opposing faces of the first and second separation ends (211, 221) which are close to each other are provided with a snap-in channel (270) which engages with each other, the first and second separation ends (211, 221) being movable in relative position along the snap-in channel (270) for adjusting the ring diameter of the stop collar (200).

5. Catheter securement device according to one of the preceding claims, characterized in that the stop collar (200) stands transversely on the second face (130) of the support strip (100) with respect to the longitudinal extension of the support strip (100).

6. Catheter securement device according to one of the preceding claims, characterized in that the support band (100) is provided with a buckle band folded back in the length direction to form a through-opening, in which buckle band the securing lobes (210) of the stop collar (200) are clamped to achieve a relative position securing of the stop collar (200) and the support band (100).

7. The catheter fixing device according to one of the preceding claims, wherein the channel (270) comprises spaced protrusions (250) and spaced gaps (260) arranged between the protrusions (250) and capable of accommodating the opposite protrusions (250), the protrusions (250) of the first separated end (211) engage the spaced gaps (260) between the protrusions (250) of the second separated end (221), and the protrusions (250) of the second separated end (221) engage the spaced gaps (260) between the protrusions (250) of the first separated end (211) to form a staggered engagement similar to a gear engagement manner, so as to maintain the fixing of the first separated end (211) and the second separated end (221), wherein a first side surface (253) and a second side surface (254) of the protrusions (250) extending transversely to the longitudinal direction of the support belt (100) can be curved surfaces having a certain curvature.

8. Catheter securement device according to one of the preceding claims, characterized in that the volume of the spacing interspace (260) is not larger than the volume of the projection (250), so that the projection (250) when entering the spacing interspace (260) can form a point contact type compression with the counter projection (250) which enables the projection (250) to generate a force transverse to the extension of the berm (270) and thus increases its connection tightness transverse to the extension of the berm (270).

9. Catheter securement device according to one of the preceding claims, characterized in that the support band (100) can be connected directly or indirectly to the body via the areas provided at its two ends for connection with the self-connecting piece (300), wherein the securement device is further provided with a complementary body connecting piece which can be connected to the binding band by means of gluing or binding as an intermediate medium.

10. Catheter securement device according to one of the preceding claims, characterized in that it further comprises a patch able to be provided with an adhesive on a first surface for connection to the body, a second surface of said patch facing away from the first surface being able to be connected to one end of the second face (130) of said support strip (100) and being provided with a connection area able to be connected to the second surface of said patch on the first face (120) of the support strip (100) based on the fastening action of the other end of the second face (130) of said support strip (100) on the catheter (400).