CN114403981B - Catheter device for mechanical thrombus removal of blood vessel - Google Patents

Catheter device for mechanical thrombus removal of blood vessel Download PDF

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Publication number
CN114403981B
CN114403981B CN202111566006.1A CN202111566006A CN114403981B CN 114403981 B CN114403981 B CN 114403981B CN 202111566006 A CN202111566006 A CN 202111566006A CN 114403981 B CN114403981 B CN 114403981B
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balloon
catheter
wall
main body
blood
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CN114403981A (en
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施磊
陈云周
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Chengdu Xinchuang Medical Equipment Co.,Ltd.
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Chengdu Bairuihengtong Medical Technology Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/12—Devices for heating or cooling internal body cavities
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1011—Multiple balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • A61B2017/22065—Functions of balloons
    • A61B2017/22067—Blocking; Occlusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/12—Devices for heating or cooling internal body cavities
    • A61F2007/126—Devices for heating or cooling internal body cavities for invasive application, e.g. for introducing into blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1075—Balloon catheters with special features or adapted for special applications having a balloon composed of several layers, e.g. by coating or embedding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1079—Balloon catheters with special features or adapted for special applications having radio-opaque markers in the region of the balloon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/32—General characteristics of the apparatus with radio-opaque indicia

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
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Abstract

The invention provides a catheter device for mechanical thrombus removal of blood vessels, which comprises a catheter main body, wherein a first balloon is arranged on the outer wall of the distal end of the catheter main body; a channel which is used for communicating with the first saccule is arranged in the pipe wall of the catheter main body, and the channel is communicated with external liquid filling equipment; the catheter device has the functions of plugging blood vessels and cooling blood in the blood vessels, and the plugged blood vessels can prevent thrombus from flowing into the distal ends of the blood vessels along with the escape of the blood, so that complications are caused; the blood temperature reduction can protect and slow down the blood flow, and the purposes of improving the success probability of the operation and reducing the operation risk are achieved; simultaneously, the plugging and blood flow temperature reduction are integrated on the catheter device, so that the operation time is saved and the optimal treatment time window is avoided from being missed due to the fact that the operator can replace the catheter according to different requirements in the operation process.

Description

Catheter device for mechanical thrombus removal of blood vessel
Technical Field
The invention relates to the technical field of medical equipment, in particular to a catheter device for mechanical thrombus removal of blood vessels.
Background
Acute ischemic stroke (acute ischemic stroke, AIS) accounts for about 85% of all strokes, has high morbidity, high disability rate, high mortality rate and high recurrence rate, and only reaches 150 ten thousand per year in China. For the treatment of patients with acute ischemic occlusion, arterial thrombolysis, arteriovenous bridging thrombolysis, angioplasty, to mechanical thrombolysis, the vascular recanalization rate of stenosis and occlusion is significantly improved over the prior art. With the development of materials and the improvement of intravascular operation level, mechanical thrombus removal is a direct means for recovering and recanalizing diseased vessels, and gradually becomes a new technology of AIS treatment.
There are two ways of mechanical embolectomy: one is a thrombus-taking stent method, and the other is a suction catheter suction method. In the two modes of operation, a small amount of thrombus emboli can escape to the far end of a blood vessel along with the scouring of arterial blood flow in the process of taking out the thrombus, so that operation complications are caused, and in addition, reperfusion after blood flow recanalization after mechanical thrombus taking in the operation process is also used as operation complications to afflict patients. These complications are potentially problematic and limit the benefits of mechanical thrombolysis.
Therefore, how to develop a catheter device capable of simultaneously reducing reperfusion injury and blocking blood flow in a short time during the whole operation process and performing the operation by matching with mechanical thrombus removal is a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a catheter device for mechanical thrombus removal of blood vessels, which solves the problem that a small amount of thrombus can escape to the far end of the blood vessels due to mechanical thrombus removal operation and the blood flow reperfusion after thrombus removal damages the blood vessels of patients to cause complications after operation of the patients.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a catheter device for mechanical thrombus removal from a blood vessel is provided, comprising a catheter body, wherein a first balloon for sealing the blood vessel when the outer wall of the distal end of the catheter body is filled is arranged on the outer wall of the distal end of the catheter body;
a plurality of second sacculus of intercommunication each other are provided with the interval between the distal end of pipe main part and the proximal end, and a plurality of second sacculus are used for cooling down with the blood of external cooling equipment intercommunication to the blood in the blood vessel.
The basic principle of the catheter device of the scheme is as follows: firstly, placing the whole catheter main body in a blood vessel of a patient, after the catheter main body is placed in place, filling liquid into a first saccule by an external liquid filling device through a channel, wherein the diameter of the first saccule is increased along with the increase of filling pressure, so that the blocking of blood flow in the blood vessel is realized, the flow of thrombus along with the blood is blocked, a small amount of thrombus is prevented from escaping to the far end of the blood vessel in the thrombus taking process, the hidden trouble of complications of the patient caused by the escape of the thrombus is reduced, and the treatment effect of mechanical thrombus taking is improved; and after the thrombus is taken out of the blood vessel, the first saccule retracts to remove the blockage of the blood vessel, so that the blood normally circulates (reperfusion), but the blood vessel is blocked by the thrombus in the area which cannot be adapted to the blood pressure and the flow rate of the normal blood circulation in time due to long-term blockage, so that the cooling liquid is filled into the plurality of second saccules through external cooling equipment, and the cooling liquid is circularly cooled in the plurality of second saccules, thereby achieving the purposes of cooling the blood and reducing the flow rate of the blood, reducing the pressure of the blood circulation on the blood vessel, further achieving the effect of reducing reperfusion injury, and reducing the operation risk of mechanical thrombus taking.
Further, as a specific embodiment of the cooling liquid in the plurality of second balloons, a liquid inlet channel and a liquid outlet channel are arranged in the pipe wall of the catheter main body along the length direction of the catheter main body; a liquid inlet and a liquid outlet which are respectively communicated with the liquid inlet channel and the liquid outlet channel are formed in the outer wall of the catheter main body in each second balloon; the liquid inlet channel and the liquid outlet channel are respectively communicated with a liquid inlet port and a liquid outlet port of the external cooling equipment.
Further, as a specific embodiment of pouring the developing solution into the first balloon, a channel for communicating with the first balloon is arranged in the wall of the catheter main body, and the channel is used for communicating with external liquid filling equipment. When a blood vessel is required to be plugged, the developing solution can be poured into the channel through the external liquid filling equipment to expand the first balloon so as to achieve the purpose of plugging the blood vessel and blocking blood circulation, meanwhile, the developing solution can be displayed on the X-ray equipment, the expansion size of the first balloon can be judged according to a display image, and a doctor can conveniently judge whether the blood vessel is completely plugged or not.
Further, the first balloon is a compliant balloon, the diameter of the first balloon after expansion is 1-6 times of the diameter of the first balloon, and because the first balloon has the function of blocking blood vessels, the self-expansibility of the first balloon is good, meanwhile, the damage to the inner walls of the blood vessels is prevented, and the first balloon can be made of soft materials such as pu, silica gel and the like and is more attached to the blood vessels; and the expansion degree of the first balloon can be observed in real time through the developing solution, so that the internal pressure of the first balloon is not required to be large, and the first balloon can be fixedly connected with the outer wall of the catheter main body in an adhesive mode.
Further, each second balloon is a semi-compliant balloon or a non-compliant balloon, and the diameter of the inflated second balloon is 1.05-1.3 times of the diameter of the inflated second balloon; the purpose of the second balloon is to enable the cooling liquid to circulate inside so as to achieve the purpose of cooling and reducing the blood, the expansion degree of the second balloon can be set to be small, meanwhile, the second balloon does not need to observe the size of the inflated balloon in real time, only the cooling liquid needs to circulate normally, so that the pressure inside the second balloon is high in the actual thrombus taking operation process, in order to avoid the damage of the second balloon caused by the high pressure, the second balloon can be made of nylon, pebax and other materials, the materials are harder compared, and the structural strength of the second balloon is guaranteed; meanwhile, the second balloon can be fixedly connected with the outer wall of the catheter main body in a connecting mode of heat sealing, laser welding, ultrasonic welding and the like, and the expanded second balloon can also ensure that the supporting performance and pushing performance of the catheter main body are not affected.
Further, in order to find out the positions of the first balloon and the second balloon through X-ray irradiation visualization in the operation process, the position of the catheter main body in the blood vessel can be conveniently adjusted by an operator, a development marking ring is arranged on a pipe section corresponding to the first balloon or each second balloon, and specifically, the development marking ring can be formed by coating a development material on the pipe section or is installed on the corresponding pipe section by adopting the existing development ring.
Further, a hydrophilic coating or an anticoagulant coating is arranged on the outer wall of the first balloon, the outer wall of the catheter main body and the outer walls of the plurality of second balloons, so that friction force between the first balloon, the second balloon and the catheter main body and the vascular wall can be reduced, the position of the catheter main body in the blood vessel can be conveniently adjusted, and abrasion of the vascular wall can be reduced.
Further, after the first saccule is used for plugging blood, thrombus needs to be taken out, a thrombus taking device is arranged in the catheter main body, the thrombus taking device comprises a puncture needle arranged in the catheter main body, the puncture needle is of a hollow structure, a plurality of uniformly spaced contraction arms are annularly arranged on the circumferential outer wall of the puncture needle, which is close to the tip, and one end of each contraction arm is hinged with the circumferential outer wall;
the puncture needle is internally provided with a guy cable main line, the head end of the guy cable main line is provided with a plurality of guy cable branch lines, and the tail end of the guy cable main line passes through the catheter main body and is positioned outside the blood vessel;
each inhaul cable branch line is matched with one shrinkage arm, and one end of each inhaul cable branch line bypasses a hinge point of each shrinkage arm and penetrates through the pipe wall of the catheter main body to be fixedly connected with the outer side wall of each shrinkage arm.
The using method of the thrombus taking device comprises the following steps: after determining the position of thrombus in a blood vessel, penetrating the catheter main body into the blood vessel, then realizing blocking of blood circulation by filling developing solution into the first saccule, penetrating the puncture needle into the catheter main body, enabling the plurality of contraction arms to be in a contracted state, enabling each contraction arm to cling to the circumferential outer wall of the catheter main body, continuing penetrating until the plurality of contraction arms on the outer wall of the puncture needle completely penetrate through the whole thrombus after the puncture needle encounters the thrombus, then pulling the inhaul cable main line backwards, driving the plurality of inhaul cable branch lines to move backwards simultaneously, enabling the plurality of contraction arms to rotate by taking a hinging point as a circle center, realizing that the plurality of contraction arms are in an opened state, moving the whole puncture needle backwards, realizing wrapping the thrombus by the plurality of contraction arms in the opened state, and finally pulling the whole catheter main body and the thrombus taking device backwards from the blood vessel after cooling the blood by the second saccule, so as to realize taking out the thrombus.
Further, as a specific mode that a plurality of contraction arms are arranged on the circumferential outer wall of the catheter main body, an annular groove is formed in the circumferential outer wall of the catheter main body, the plurality of contraction arms are all arranged in the annular groove, the cross section of each contraction arm is of an arc structure, one end of each contraction arm is hinged with one side wall of the annular groove through a hinge, and an elastic contact used for being in contact with the other side wall of the annular groove is arranged at the other end of each contraction arm; when the shrinkage arm is retracted into the annular groove, the outer wall of the shrinkage arm is flush with the circumferential outer wall of the catheter main body, and the elastic contact is in extrusion contact with the side wall of the annular groove. In the process that the puncture needle penetrates through thrombus, the plurality of storage arms are stored in the annular groove, the outer wall of the shrinkage arm is flush with the circumferential outer wall of the catheter main body, damage of puncture to thrombus can be reduced, the thrombus damage degree is reduced, the risk of thrombus which is damaged due to thrombus damage in the thrombus taking process and escapes along with blood can be reduced, the treatment effect of thrombus taking is improved, and complications are reduced.
The beneficial effects of the invention are as follows: the catheter device in the scheme has the functions of blocking the blood vessel and cooling blood in the blood vessel, and the blocking of the blood vessel can prevent thrombus from causing complications along with the inflow of blood into the distal end of the blood vessel; the blood temperature reduction can protect brain tissues, so that the purposes of improving the success probability of surgery and reducing the risk of surgery are achieved; simultaneously, the plugging and blood flow temperature reduction are integrated on the catheter main body, so that the operation time is saved by avoiding that an operator changes the catheter according to different requirements in the operation process, and the optimum treatment time window is avoided being missed.
Drawings
Fig. 1 is a schematic structural view of a catheter device for mechanical thrombolysis of a blood vessel.
Fig. 2 is a schematic cross-sectional structure of a catheter body with a channel.
Fig. 3 is a schematic view of a second balloon disposed on the distal end of the catheter body.
Fig. 4 is an enlarged schematic view of the thrombus removal device in the catheter body.
Fig. 5 is a schematic cross-sectional view of the thrombolytic device disposed within the catheter body.
Wherein, 1, the catheter main body; 2. a channel; 3. a second balloon; 4. a liquid inlet channel; 5. a liquid outlet channel; 6. a liquid inlet; 7. a liquid outlet; 8. developing the marking ring; 9. a first balloon; 10. a thrombus taking device; 11. a puncture needle; 12. a retraction arm; 13. a guy cable main line; 14. a cable branch line; 15. an annular groove; 16. and an elastic contact.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1 to 5, the present invention provides a catheter device for mechanical thrombus removal from a blood vessel, comprising a catheter body 1, wherein a first balloon 9 for sealing the blood vessel when the outer wall of the distal end of the catheter body 1 is filled is arranged on the outer wall of the distal end;
a plurality of second balloons 3 which are mutually communicated are arranged between the distal end and the proximal end of the catheter main body 1 at intervals, and the second balloons 3 are used for being communicated with external cooling equipment to cool blood in blood vessels.
The first balloon 9 is a compliant balloon, the diameter of the first balloon 9 after expansion is 1-6 times of the diameter of the first balloon, and because the first balloon 9 has the function of sealing the blood vessel, the self-expansibility of the first balloon 9 is good, meanwhile, the damage to the inner wall of the blood vessel is prevented, and the first balloon 9 can be made of soft materials such as pu, silica gel and the like and is more attached to the blood vessel; when the first balloon 9 is inflated by the introduced developing solution, the inflation degree can be observed in real time through X-ray irradiation, so that the internal pressure of the first balloon 9 is not required to be great, and the first balloon 9 can be fixedly connected with the outer wall of the catheter main body 1 in an adhesive manner.
Each second balloon 3 is a semi-compliant balloon or a non-compliant balloon, and the diameter of the inflated second balloons 3 is 1.05 to 1.3 times of the diameter of the inflated second balloons; the purpose of the arrangement of the second balloon 3 is to enable the cooling liquid to circulate inside so as to achieve the purpose of cooling and reducing the blood, the expansion degree of the second balloon 3 can be set to be small, meanwhile, the second balloon 3 does not need to observe the size of the inflated second balloon in real time, only the cooling liquid needs to circulate normally, so that the pressure inside the second balloon 3 is high in the actual thrombus taking operation process, in order to avoid the damage of the second balloon 3 caused by the high pressure, the second balloon 3 can be made of nylon, pebax and other materials, the materials are harder compared with each other, and the structural strength of the second balloon 3 is guaranteed; meanwhile, the second balloon 3 can be fixedly connected with the outer wall of the catheter main body 1 in a connecting mode of heat sealing, laser welding, ultrasonic welding and the like, and the expanded second balloon 3 can also ensure that the supporting performance and pushing performance of the catheter main body 1 are not affected.
The using method of the catheter device for mechanical thrombus removal of the blood vessel comprises the following steps: firstly, the whole catheter main body 1 is placed in a blood vessel of a patient, after the catheter main body 1 is placed in place, an external liquid filling device fills liquid to the first balloon 9 through the channel 2, the diameter of the first balloon 9 is increased along with the increase of filling pressure, so that the blocking of blood flow in the blood vessel is realized, the flow of thrombus along with the blood is blocked, a small amount of thrombus is prevented from escaping to the far end of the blood vessel in the thrombus taking-out process, the hidden trouble of complications of the patient caused by the escape of the thrombus is reduced, and the treatment effect of mechanical thrombus taking is improved; after taking out thrombus from the blood vessel, the first balloon 9 retracts to release the blocking of the blood vessel, so that the blood normally flows (reperfusion), but at the moment, the blood pressure and the flow rate of the blood vessel blocked by the thrombus cannot be adapted to the normal blood circulation in time due to long-term blocking, and then the cooling liquid is filled into the plurality of second balloons 3 through the external cooling equipment, and the cooling liquid is circularly cooled in the plurality of second balloons 3, so that the purposes of cooling the blood and reducing the flow rate of the blood are achieved, the pressure of the blood circulation on the blood vessel is reduced, the effect of reducing reperfusion injury is achieved, and the surgical risk of mechanical thrombus taking is reduced.
As a preferred embodiment of the cooling liquid circulating in the plurality of second balloons 3, the outer wall of the catheter main body 1 in each second balloon 3 is provided with a liquid inlet 6 and a liquid outlet 7 which are respectively communicated with the liquid inlet channel 4 and the liquid outlet channel 5, and specifically, the inner wall of the catheter main body 1 is provided with the liquid inlet channel 4 and the liquid outlet channel 5 along the length direction thereof; the outer wall of the catheter main body 1 is provided with liquid inlets 6 the same as the second balloons 3 in number, each liquid inlet 6 is matched with one second balloon 3, and each second balloon 3 is communicated with the liquid inlet channel 4 through the liquid inlet 6; a liquid outlet 7 is arranged in the second balloon 3 positioned at the far end of the catheter main body 1, one end of the liquid outlet 7 is communicated with the second balloon 3, and the other end is communicated with the liquid outlet channel 5; the liquid inlet channel 4 and the liquid outlet channel 5 are respectively used for communicating with a liquid inlet port and a liquid outlet port of external cooling equipment. In the mechanical thrombus taking process, the external cooling equipment inputs and outputs cooling liquid into the plurality of second balloons 3 through the liquid inlet channel 4 and the liquid outlet channel 5, so that the cooling liquid circulates among the plurality of second balloons 3, the purpose of reducing blood is achieved, and the surgical requirement that the brain tissue is protected by reducing the blood temperature in the middle of the surgery is met.
As a preferred embodiment of pouring the developing solution into the first balloon 9, a channel 2 for communicating with the first balloon 9 is provided in the wall of the catheter main body 1, the channel 2 is used for communicating with an external liquid filling device, and the cross section of the channel 2 may be a regular pattern, such as a circle, a rectangle, etc., or an irregular pattern. When a blood vessel is required to be plugged, the developing solution can be filled into the channel 2 through the external liquid filling equipment to expand the first balloon 9 so as to achieve the purpose of plugging the blood vessel and blocking blood circulation, meanwhile, the developing solution can be displayed on the X-ray equipment, the expansion size of the first balloon 9 can be judged according to a display image, and a doctor can conveniently judge whether the blood vessel is completely plugged or not.
In order to find the position of the first balloon 9 or the second balloon 3 by X-ray irradiation visualization during the operation, the operator can conveniently adjust the position of the catheter main body 1 in the blood vessel, the first balloon 9 or each tube section corresponding to the second balloon 3 is provided with a visualization mark ring 8, and specifically, the visualization mark ring 8 can be formed by coating a visualization material on the tube section or be installed on the corresponding tube section by adopting the existing visualization ring.
The outer walls of the first balloon 9, the tube walls of the catheter body 1 and the outer walls of the plurality of second balloons 3 are respectively provided with a hydrophilic coating or an anticoagulant coating, so that friction force between the first balloon 9, the second balloon 3 and the catheter body 1 and the tube walls of the blood vessels can be reduced, the position of the catheter body 1 in the blood vessels can be conveniently adjusted, and abrasion of the tube walls of the blood vessels can be reduced.
After the first sacculus 9 is used for plugging blood, the thrombus needs to be taken out, a thrombus taking device 10 is arranged in the catheter main body 1, the thrombus taking device 10 comprises a puncture needle 11 arranged in the catheter main body 1, the puncture needle 11 is of a hollow structure, a plurality of uniformly spaced contraction arms 12 are annularly arranged on the circumferential outer wall of the puncture needle 11 close to the tip, and one end of each contraction arm 12 is hinged with the circumferential outer wall;
the puncture needle 11 is internally provided with a cable main line 13, the head end of the cable main line 13 is provided with a plurality of cable branch lines 14, and the tail end of the cable main line 13 passes through the catheter main body 1 and is positioned outside a blood vessel;
each cable branch 14 is matched with one contraction arm 12, and one end of each cable branch 14 bypasses the hinge point of the contraction arm 12 and penetrates through the pipe wall of the catheter main body 1 to be fixedly connected with the outer side wall of the contraction arm 12.
The method for using the thrombus taking device 10 comprises the following steps: after determining the position of thrombus in a blood vessel, penetrating the catheter main body 1 into the blood vessel, then filling developing solution into the first saccule 9 to realize blocking of blood circulation, penetrating the puncture needle 11 into the catheter main body 1, enabling the plurality of contraction arms 12 to be in a contracted state, enabling each contraction arm 12 to cling to the circumferential outer wall of the catheter main body 1, continuing penetrating after the puncture needle 11 encounters thrombus, until the plurality of contraction arms 12 on the outer wall of the puncture needle 11 completely penetrate the whole thrombus, then pulling the guy cable main line 13 backwards, enabling the guy cable main line 13 to simultaneously drive the plurality of guy cable branch lines 14 to move backwards, enabling the plurality of contraction arms 12 to rotate by taking a hinging point as a circle center, enabling the plurality of contraction arms 12 to be in an opened state, moving the whole puncture needle 11 backwards, enabling the plurality of contraction arms 12 to realize wrapping of thrombus, and finally pulling the whole catheter main body 1 and the thrombus taking-out device 10 backwards from the blood vessel after cooling the blood through the second saccule 3, and realizing taking out of thrombus.
As a preferred mode that the plurality of contraction arms 12 are arranged on the circumferential outer wall of the catheter main body 1, an annular groove 15 is arranged on the circumferential outer wall of the catheter main body 1, the plurality of contraction arms 12 are all arranged in the annular groove 15, the cross section of each contraction arm 12 is in an arc structure, one end of each contraction arm 12 is hinged with one side wall of the annular groove 15 through a hinge, and the other end of each contraction arm 12 is provided with an elastic contact 16 for contacting with the other side wall of the annular groove 15; when the contraction arm 12 is retracted into the annular groove 15, the outer wall of the contraction arm 12 is flush with the circumferential outer wall of the catheter main body 1, and the elastic contact 16 is in extrusion contact with the side wall of the annular groove 15, so that the contraction arm 12 can be prevented from being opened independently; simultaneously, a limiting block can be arranged on the side wall of the annular groove 15, and the limiting block can limit the opening angle of the contraction arm 12. In the process that the puncture needle 11 penetrates through thrombus, the plurality of storage arms are stored in the annular groove 15, the outer wall of the shrinkage arm 12 is flush with the circumferential outer wall of the catheter main body 1, so that the damage of the puncture needle 11 to the thrombus can be reduced, the damage degree of the thrombus can be reduced, the risk of the thrombus damaged by the damage to the thrombus in the thrombus taking process escaping along with blood can be reduced, the treatment effect of thrombus taking can be improved, and the occurrence of complications can be reduced.

Claims (7)

1. Catheter device for mechanical thrombectomy of blood vessels, characterized in that it comprises a catheter body (1), a first balloon (9) for occluding the blood vessels when filled being arranged on the outer wall of the distal end of the catheter body (1);
a plurality of second balloons (3) which are communicated with each other are arranged between the far end and the near end of the catheter main body (1) at intervals, and the second balloons (3) are communicated with external cooling equipment to cool blood in blood vessels;
when a blood vessel is required to be plugged, filling developing solution into the channel through external liquid filling equipment to expand the first balloon (9) so as to achieve the purpose of plugging the blood vessel and blocking blood circulation, displaying the developing solution on X-ray equipment, and judging the expansion of the first balloon (9) according to a display image;
the catheter is characterized in that a thrombus taking device (10) is arranged in the catheter main body (1), the thrombus taking device (10) comprises a puncture needle (11) arranged in the catheter main body (1), the puncture needle (11) is of a hollow structure, a plurality of uniformly spaced contraction arms (12) are annularly arranged on the circumferential outer wall, close to the tip, of the puncture needle (11), and one end of each contraction arm (12) is hinged with the circumferential outer wall;
a guy cable main wire (13) is arranged in the puncture needle (11), a plurality of guy cable branch wires (14) are arranged at the head end of the guy cable main wire (13), and the tail end of the guy cable main wire (13) penetrates through the catheter main body (1) and is positioned outside a blood vessel;
each inhaul cable branch line (14) is matched with one shrinkage arm (12), and one end of each inhaul cable branch line (14) bypasses a hinge point of each shrinkage arm (12) and penetrates through the pipe wall of the catheter main body (1) to be fixedly connected with the outer side wall of each shrinkage arm (12);
an annular groove (15) is formed in the circumferential outer wall of the catheter main body (1), a plurality of contraction arms (12) are arranged in the annular groove (15), the cross section of each contraction arm (12) is of an arc structure, one end of each contraction arm (12) is hinged with one side wall of the annular groove (15) through a hinge, and an elastic contact (16) used for being in contact with the other side wall of the annular groove (15) is arranged at the other end of each contraction arm (12); when the shrinkage arm (12) is retracted into the annular groove (15), the outer wall of the shrinkage arm (12) is flush with the circumferential outer wall of the catheter main body (1), and the elastic contact (16) is in extrusion contact with the side wall of the annular groove (15).
2. Catheter device for vascular mechanical embolectomy according to claim 1, characterized in that the catheter body (1) has a liquid inlet channel (4) and a liquid outlet channel (5) arranged in its length direction in the wall of the catheter body (1);
a liquid inlet (6) and a liquid outlet (7) which are respectively communicated with the liquid inlet channel (4) and the liquid outlet channel (5) are arranged on the outer wall of the catheter main body (1) in each second balloon (3);
the liquid inlet channel (4) and the liquid outlet channel (5) are respectively used for communicating with a liquid inlet port and a liquid outlet port of external cooling equipment.
3. Catheter device for vascular mechanical embolectomy according to claim 1, characterized in that a channel (2) for communication with the first balloon (9) is provided in the wall of the catheter body (1).
4. A catheter device for vascular mechanical embolectomy according to claim 3, characterized in that the first balloon (9) is a compliant balloon, the first balloon (9) having a diameter after inflation of 1-6 times its diameter.
5. Catheter device for vascular mechanical embolectomy according to claim 4, characterized in that each of the second balloons (3) is a semi-compliant balloon or a non-compliant balloon, the second balloon (3) having a inflated diameter of 1.05-1.3 times its diameter after filling.
6. Catheter device for vascular mechanical embolectomy according to claim 5, characterized in that the first balloon (9) or each second balloon (3) is provided with a visualization marker ring (8) on the corresponding tube segment.
7. Catheter device for vascular mechanical embolectomy according to claim 1, characterized in that the outer wall of the first balloon (9), the wall of the catheter body (1) and the outer walls of the plurality of second balloons (3) are provided with a hydrophilic or anticoagulant coating.
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CN115192304A (en) * 2022-07-15 2022-10-18 成都百瑞恒通医疗科技有限公司 Blood cooling catheter and blood cooling equipment
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