A thrombectomy balloon

Abstract

The present invention discloses a thrombectomy balloon, belonging to the technical field of interventional treatment devices, which includes a catheter; a balloon connected to the distal end of the catheter and capable of radially expanding outward relative to the catheter; a sliding ring slidably connected to the catheter; a barb assembly including a barb stent with a proximal end connected to the sliding ring and a distal end connected to the balloon; the barb stent has a retracted state before the balloon is expanded and an expanded state in which it radially expands outward under the thrust when the balloon radially expands; the barb stent is provided with barbs suitable for scraping thrombus. By additionally providing a barb assembly between the balloon and the sliding ring, when the balloon radially expands, the balloon drives the barb stent to expand outward, and the barbs on the barb stent stand up; when the catheter is withdrawn, the barbs on the barb stent scrape the thrombus attached to the blood vessel wall, and the inflated balloon drags the thrombus out of the body through the traction effect on the thrombus, which can enhance the thrombus removal effect of the thrombectomy balloon.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional treatment devices, and particularly to a thrombectomy balloon. Background Art

[0002] Thrombosis refers to the pathological process in which blood components form emboli in blood vessels under certain conditions, causing partial or complete blockage of blood vessels and blood supply disorders in the corresponding parts. Currently, the main treatment methods for thrombotic diseases include: drug treatments such as anticoagulation, antithrombosis, and thrombolysis, surgical treatment, and interventional treatment, etc. For patients with old thrombus who have poor efficacy after medical treatment and poor collateral circulation formation, surgical treatment can be considered, that is, surgically removing the thrombus or excising the embolized blood vessel segment and reanastomosing it. Interventional treatment includes local thrombolysis through a catheter, aspirating thrombus through a catheter under negative pressure, and mechanically removing thrombus through devices such as balloons and stents.

[0003] In interventional treatment, a thrombectomy balloon is commonly used. By using corresponding interventional instruments, the latex balloon at the front end is pushed and passed over the site with thrombus or embolism, the latex balloon is filled until it contacts the blood vessel wall, and the catheter is withdrawn, and the thrombus is dragged out of the body along with the balloon.

[0004] In the process of practice of the existing thrombectomy balloons, the thrombectomy effect is not particularly ideal. How to design a thrombectomy balloon with a better thrombectomy effect is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a thrombectomy balloon to solve the defect of poor thrombectomy effect of the existing thrombectomy balloons, thereby providing a thrombectomy balloon.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A thrombectomy balloon, comprising:

[0008] A catheter;

[0009] A balloon, connected to the distal end of the catheter and capable of radially expanding outward relative to the catheter;

[0010] A sliding ring, axially slidably connected to the outer periphery of the catheter, and the sliding ring is located proximal to the balloon;

[0011] A barb assembly, including a barb support with the proximal end connected to the sliding ring and the distal end connected to the balloon; the barb support has a retracted state in which it retracts to the outer periphery of the catheter before the balloon expands or after pressure relief, and an expanded state in which the distal end expands radially outward relative to the catheter under the thrust when the balloon radially expands; barbs are provided on the barb support, and when the barb support is in the expanded state and moves proximally as a whole with the catheter, the barbs are adapted to scrape thrombus.

[0012] Further, a plurality of barbed components are circumferentially arranged around the catheter; the proximal ends of the plurality of barbed brackets are rotatably connected to the sliding ring, and the distal ends of the plurality of barbed brackets are connected to different positions in the circumferential direction of the balloon.

[0013] Further, a plurality of spikes are arranged along the length direction of the barbed bracket.

[0014] Further, the spike is rotatably connected to the barbed bracket around a fixed axis. During the process of rotating around the fixed axis, the spike has a lying state in which the tip part is received inside the barbed bracket or the tip part lies flat on the surface of the barbed bracket, and an upright state in which the spike is arranged at an angle to the length direction of the barbed bracket and the tip part extends outwards from the surface of the barbed bracket; when the spike is in the upright state, the spike is adapted to scrape thrombus.

[0015] Further, when the spike is in the upright state, the tip part of the spike is located at the proximal end of the spike.

[0016] Further, when the barbed bracket is in the retracted state, the spike is in the lying state; when the barbed bracket expands radially from the retracted state to the deployed state along with the balloon, the spike synchronously rotates from the lying state to the upright state; when the barbed bracket retracts from the deployed state to the retracted state along with the pressure relief of the balloon, the spike synchronously rotates from the upright state to the lying state.

[0017] Further, the barbed bracket is connected with a transmission member. The length direction of the transmission member is the same as the length direction of the barbed bracket, and the transmission member is in transmission connection with the spike; a fixing ring fixed on the outer periphery of the catheter is arranged at the proximal end of the sliding ring, and an elastic member is connected between the proximal end of the transmission member and the fixing ring;

[0018] When the barbed bracket is in the retracted state, the elastic member is in an elastically compressed state, and the spike is in the lying state under the thrust of the transmission member;

[0019] When the barbed bracket expands radially from the retracted state to the deployed state along with the balloon, the proximal end of the barbed bracket slides distally along the axial direction of the catheter along with the sliding ring, the elastic member is stretched from the elastically compressed state to the elastically stretched state, and the spike rotates from the lying state to the upright state under the pulling force of the transmission member;

[0020] When the barbed stent is contracted from the expanded state to the contracted state as the balloon is depressurized, the proximal end of the barbed stent slides proximally along the axial direction of the catheter along the sliding ring, the elastic member is compressed from the elastically stretched state to the elastically compressed state, and the spikes are rotated from the upright state to the lying state under the thrust of the transmission member.

[0021] Furthermore, a groove is provided on the barb bracket, and the length direction of the groove is arranged along the length direction of the barb bracket, the fixed shaft is connected to the groove side wall of the groove, and the transmission member is slidably connected to the groove bottom of the groove; when the spike is in the lying state, the tip part of the spike is accommodated in the groove; when the spike is in the standing state, the tip part of the spike extends outward from the side notch of the groove.

[0022] Furthermore, the side notch of the groove is located on a side of the barb bracket facing away from the catheter.

[0023] Furthermore, the spike includes a transmission part and a tip part located at opposite ends; the transmission member is a linkage rod, and the linkage rod is fixedly connected to the transmission part of the spike; or the transmission member is a rack, and the transmission part is provided with a gear, and the rack is meshingly connected to the gear of the spike.

[0024] The technical solution of the present invention has the following advantages: the thrombectomy balloon is provided with a barbed stent additionally arranged between the balloon and the sliding ring, and sharp spikes are arranged on the barbed stent; before the balloon is expanded, the barbed stent is gathered at the outer periphery of the catheter, which can reduce the overall outer diameter and improve the permeability of the catheter; when the balloon expands radially, the balloon drives the distal end of the barbed stent to expand outward, and the proximal end of the barbed stent drives the sliding ring to slide a distance toward the distal end on the catheter, and when the expanded balloon and the barbed stent in the expanded state are retracted toward the proximal end along with the catheter as a whole, the sharp spikes on the barbed stent scrape the thrombus attached to the blood vessel wall, and the scraped thrombus will be dragged out of the body by the balloon, which can enhance the thrombus removal effect of the thrombectomy balloon compared with the method of only relying on the balloon to drag the thrombus in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1Schematic diagram of the thrombus extraction balloon in the pressure relief state, the barbed stent in the retracted state, and the spikes in the lying state in the first embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the thrombus extraction balloon in the inflated state, the barbed stent in the deployed state, and the spikes in the three-dimensional state in the first embodiment of the present invention;

[0028] Figure 3 For Figure 2 Cross-sectional view;

[0029] Figure 4 For Figure 3 Enlarged view of part A in

[0030] Figure 5 Schematic diagram of the structure of the barbed stent, spikes, and linkage rod in the first embodiment of the present invention;

[0031] Figure 6 For Figure 5 Cross-sectional view;

[0032] Figure 7 Schematic diagram of the structure of the barbed stent, spikes, and rack in the second embodiment of the present invention;

[0033] Figure 8 For Figure 7 Cross-sectional view;

[0034] Figure 9 For Figure 8 Enlarged view of part B in

[0035] Explanation of reference numerals: 1. catheter; 2. balloon; 3. sliding ring; 4. barbed component; 41. barbed stent; 411. groove; 42. spike; 421. tip part; 422. transmission part; 43. fixed shaft; 44. linkage rod; 45. rack; 5. fixed ring; 6. elastic member. Detailed implementation manners

[0036] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present application, it should be understood that the terms "proximal end" and "distal end" throughout the text refer to near and far relative to the operator. When the present invention is in use, the end close to the doctor or operator is the "proximal end", that is, the end where the operator is located, and the end far from the doctor or operator is the "distal end", that is, the end where the balloon is located. The above description of the orientation is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0038] Embodiment 1

[0039] As Figures 1 - 9 shown, a thrombectomy balloon includes a catheter 1, a balloon 2, a sliding ring 3 and a barb assembly 4. Among them, the catheter 1 is a multi-lumen tube, and a filling channel is provided in the lumen of the multi-lumen tube. The balloon 2 is connected to the distal end of the catheter 1, and the inner cavity of the balloon 2 communicates with the filling channel in the catheter 1; the catheter 1 is used to push the distal balloon 2 and cross the part of the blood vessel with thrombus or embolism. The balloon 2 has compliance. For example, the balloon 2 is a latex balloon made of natural latex. The latex balloon has good softness, can fit well with the blood vessel wall, and has advantages such as good sealing performance, high ductility and tear resistance. After the inner cavity of the balloon 2 is filled, it can expand radially outward relative to the catheter 1 and fit the blood vessel wall, and after the inner cavity of the balloon 2 is depressurized, it can retract radially inward relative to the catheter 1. The sliding ring 3 is slidably connected to the outer periphery of the catheter 1 along the axial direction of the catheter 1, and the sliding ring 3 is located at the proximal end of the balloon 2. The barb assembly 4 includes a barb support 41 and barbs 42 connected to the barb support 41. Both the barb support 41 and the barbs 42 are rigid components, and the barbs 42 have a tip portion suitable for scraping thrombus; the proximal end of the barb support 41 is connected to the sliding ring 3, and the distal end of the barb support 41 is connected to the balloon 2. The barb support 41 has a retracted state in which it is retracted to the outer periphery of the catheter 1 before the balloon 2 is expanded or after depressurization, and an expanded state in which the distal end expands radially outward relative to the catheter 1 under the thrust when the balloon 2 expands radially.

[0040] This thrombectomy balloon is characterized by additionally providing a barbed stent 41 between the balloon 2 and the sliding ring 3, and providing spikes 42 on the barbed stent 41; before the balloon 2 is expanded, the barbed stent 41 is retracted at the outer circumference of the catheter 1, which can reduce the overall outer diameter and improve the passability of the catheter 1; when the balloon 2 radially expands, the balloon 2 drives the distal end of the barbed stent 41 to expand outward, and the proximal end of the barbed stent 41 drives the sliding ring 3 to slide a distance toward the distal end on the catheter 1, and when the expanded balloon 2 and the barbed stent 41 in the expanded state are retracted toward the proximal end along with the catheter 1 as a whole, the spikes 42 on the barbed stent 41 scrape the thrombus attached to the blood vessel wall, and the scraped thrombus will be dragged out of the body by the balloon 2. Compared with the method of relying solely on the balloon 2 to drag the thrombus in the prior art, the thrombus removal effect of the thrombectomy balloon can be enhanced.

[0041] In some embodiments, Figure 2 As shown, multiple barb brackets 41 are evenly arranged around the circumference of the catheter 1, and multiple spikes 42 are arranged along the length direction of the barb brackets 41. The proximal ends of the multiple barb brackets 41 are all rotatably connected to the same sliding ring 3, and the distal ends of the multiple barb brackets 41 are all fixed at different positions of the proximal circumference of the balloon 2. There are multiple barb brackets 41, and there are multiple spikes 42 on the barb brackets 41. Such an arrangement can increase the scraping area of ​​the spikes 42 on the barb assembly 4, thereby enhancing the thrombus removal effect of the thrombus removal balloon. In other alternative embodiments, the distal ends of the multiple barb brackets 41 can also be fixed to the middle part of the balloon 2 or the distal end of the balloon 2.

[0042] In some embodiments, in combination Figure 4 , Figure 5 and Figure 6As shown, the barbed stent 41 is provided with a groove 411. The length direction of the groove 411 is arranged along the length direction of the barbed stent 41. A fixed shaft 43 is connected between a pair of groove side walls of the groove 411. The axial direction of the fixed shaft 43 is perpendicular to the length direction of the barbed stent 41. The barb 42 is rotatably connected to the barbed stent 41 around the fixed shaft 43. The barb 42 includes a tip portion 421 and a transmission portion 422 located at both ends in the length direction. During the process of the barb 42 rotating around the fixed shaft 43, the barb 42 has a lying state in which the tip portion 421 is received inside the groove 411 of the barbed stent 41, and an erected state in which the barb 42 is arranged at an angle with the length direction of the barbed stent 41 and the tip portion 421 extends outwards from the side notch of the groove 411 on the barbed stent 41. When multiple barbs 42 are in the erected state, the tip portion 421 of the barb 42 is located at the proximal end of the barb 42, that is, the tip portions 421 of multiple barbs 42 all point to the proximal end of the catheter 1. With such a setting, when the barbed stent 41 is in the retracted state and multiple barbs 42 are in the lying state, the tip portions 421 of multiple barbs 42 will not extend out of the groove 411 of the barbed stent 41, and the barbs 42 do not need to occupy extra space outside the catheter 1, which can improve the passability of the catheter 1; when the barbed stent 41 is in the deployed state and multiple barbs 42 are in the erected state, the tip portions 421 of multiple barbs 42 extend outwards from the side notch of the groove 411, which can improve the scraping effect of the barbs 42. In other alternative embodiments, the groove 411 on the barbed stent 41 can be cancelled, at least one end of the fixed shaft 43 extends out from the side surface of the barbed stent 41, and the barb 42 is rotatably connected to the outer side wall of the barbed stent 41 around the fixed shaft 43. When the barb 42 is in the lying state, the tip portion 421 of the barb 42 lies flat on one side of the barbed stent 41; when the barb 42 is in the erected state, the barb 42 is arranged at an angle with the length direction of the barbed stent 41 and the tip portion 421 extends outwards from the side surface of the barbed stent 41.

[0043] Further, when multiple barbs 42 are in the erected state, the length directions of multiple barbs 42 are parallel and all parallel to the length direction of the catheter 1.

[0044] In some embodiments, such as Figure 4 、 Figure 5 and Figure 6As shown, when the barb support 41 is in the retracted state, the barbs 42 are in the lying state; when the barb support 41 expands radially with the balloon 2 from the retracted state to the deployed state, the barbs 42 synchronously rotate from the lying state to the standing state; when the barb support 41 retracts with the pressure relief of the balloon 2 from the deployed state to the retracted state, the barbs 42 synchronously rotate from the standing state to the lying state. With this arrangement, only by the radial expansion of the balloon 2, the deployment action of the barb support 41 and the standing action of the barbs 42 can be synchronously achieved, without the need to additionally provide a transmission structure to drive the barbs 42 to rotate around the fixed shaft 43, and the overall structure is simpler. In other alternative embodiments, the rotation of the barbs 42 around the fixed shaft 43 can be achieved by an additional transmission mechanism, that is to say, the deployment and retraction actions of the barb support 41 are driven by the balloon 2, and the rotation action of the barbs 42 is driven by other transmission mechanisms not associated with the balloon 2.

[0045] In some embodiments, as Figure 4 , Figure 5 and Figure 6 shown, a transmission member is slidably connected to the bottom of the groove 411 of the barb support 41. The transmission member is specifically a linkage rod 44, and the length direction of the linkage rod 44 is the same as the length direction of the barb support 41. The linkage rod 44 is slidably connected to the bottom of the groove 411, and one end of the linkage rod 44 extends out from the proximal opening of the groove 411; the linkage rod 44 is fixedly connected to the plurality of transmission parts 422 of the plurality of barbs 42, and the linkage rod 44 can drive the plurality of barbs 42 to rotate when sliding.

[0046] As Figure 4 , Figure 5 and Figure 6As shown in the figure, a fixing ring 5 fixed to the outer periphery of the catheter 1 is provided at the proximal end of the sliding ring 3. Elastic members 6 are connected between the proximal ends of a plurality of linkage rods 44 and the fixing ring 5. The sliding ring 3 is provided with through holes, and the elastic members 6 pass through the through holes in the sliding ring 3 and are connected to the proximal ends of the linkage rods 44. When the barb stent 41 is in the retracted state, the elastic member 6 is in an elastically compressed state, and the elastic member 6 exerts a thrust force towards the distal end of the catheter 1 on the linkage rod 44, and a plurality of barbs 42 are in a lying state under the thrust force of the linkage rod 44. When the barb stent 41 expands from the retracted state to the deployed state along with the radial expansion of the balloon 2, the proximal end of the barb stent 41 slides distally along the axial direction of the catheter 1 with the sliding ring 3, and the elastic member 6 is stretched from the elastically compressed state to the elastically stretched state. The elastic member 6 exerts a pulling force towards the proximal end of the catheter 1 on the linkage rod 44, and a plurality of barbs 42 rotate from the lying state to the standing state under the pulling force of the transmission member. When the barb stent 41 contracts from the deployed state to the retracted state along with the pressure relief of the balloon 2, the proximal end of the barb stent 41 slides proximally along the axial direction of the catheter 1 with the sliding ring 3, and the elastic member 6 is compressed from the elastically stretched state to the elastically compressed state. The elastic member 6 exerts a thrust force towards the distal end of the catheter 1 on the linkage rod 44, and a plurality of barbs 42 rotate from the standing state to the lying state under the thrust force of the linkage rod 44. With such a setting, by providing the fixing ring 5 on the outer periphery of the catheter 1 and connecting the elastic member 6 with compression elastic performance and tensile elastic performance between the fixing ring 5 and the linkage rod 44, before the balloon 2 is inflated, the barbs 42 can be kept in the lying state under the elastic action of the elastic member 6 to prevent the barbs 42 from standing up and affecting the passing performance of the catheter 1; after the balloon 2 is inflated, the barbs 42 can be kept in the standing state under the elastic action of the elastic member 6 even when subjected to a large external resistance, which is beneficial to improving the ability of the barbs 42 to scrape thrombus; when the balloon 2 deflates and retracts, the barbs 42 can automatically return to the lying state under the elastic action of the elastic member 6, which is beneficial to reducing the overall size of the catheter 1 after the balloon 2 deflates and facilitating the withdrawal of the entire catheter 1 from the body; the overall structure is simple and easy to implement.

[0047] In some embodiments, as Figure 5 and Figure 6 shown, the cross-section of the barb stent 41 is circular or square, and the side slot of the groove 411 is located on the side of the barb stent 41 facing away from the catheter 1. When the barb 42 is in the standing state, the tip portion 421 of the barb 42 extends outwards from the side slot of the groove 411. In other alternative embodiments, the side slot of the groove 411 can also be located on other sides of the barb stent 41; the groove 411 can have a side slot on only one side, or can have side slots on both sides at the same time; when the groove 411 has side slots on both sides, correspondingly, there are two groups of barbs in the barb stent 41, and each group of barbs can extend outwards from the side slot of one of the grooves 411 during the rotation process.

[0048] When the thrombus removal balloon in the above-mentioned embodiment 1 is used, the catheter 1 containing the deflated balloon 2 is first gently inserted into the blood vessel through the guide wire. After the balloon 2 passes the stenosis or thrombus site, the balloon 2 is inflated to make it fit closely to the blood vessel wall. As the balloon 2 expands, the barbed bracket 41 unfolds, and the spikes 42 on the barbed bracket 41 stand up after being pulled by the elastic member 6. Then, the catheter 1 is slowly withdrawn, and the thrombus is removed by the traction effect of the expanded balloon 2 on the thrombus. At the same time, the spikes 42 have the effect of scraping the thrombus.

[0049] Embodiment 2

[0050] like Figures 7 - 9 The thrombus removal balloon shown is different from the first embodiment in that the transmission member is specifically a rack 45 with multiple tooth grooves, the rack 45 is slidably connected to the bottom of the groove 411, the transmission part 422 of the spike 42 is provided with a gear, and the rack 45 is meshed and transmission-connected with multiple gears of the multiple spikes 42. In this thrombus removal balloon, the barb bracket 41 will move relative to the rack 45 during the deployment process. When the two slide relative to each other, the rack 45 will drive the spike 42 to rotate through the gear, and combined with the push-pull action of the elastic member 6 on the rack 45, the spike 42 can be automatically switched between the lying state and the standing state.

[0051] In summary, the thrombus removal balloon provided by the present invention has an additional barb bracket 41 between the balloon 2 and the sliding ring 3, a spike 42 is arranged on the barb bracket 41, and an elastic member 6 is arranged between the spike 42 and the fixing ring 5; before the balloon 2 is expanded, the barb bracket 41 is retracted at the outer periphery of the catheter 1, and the spike 42 lies flat in the groove 411 of the barb bracket 41 under the thrust of the elastic member 6, which can reduce the overall outer diameter and improve the passability of the catheter 1; when the balloon 2 radially expands, the balloon 2 drives the distal end of the barb bracket 41 to expand outward, and the proximal end of the barb bracket 41 drives the sliding ring 3 to expand outward. The movable ring 3 slides a distance toward the distal end on the catheter 1, and the elastic member 6 changes from an elastic compression state to an elastic tension state. The spikes 42 remain in an upright state under the pulling force of the elastic member 6, thereby improving the scraping ability of the spikes 42; when the expanded balloon 2 and the barbed stent 41 in the expanded state are retracted toward the proximal end along with the catheter 1 as a whole, the upright spikes 42 on the barbed stent 41 scrape the thrombus attached to the blood vessel wall, and the scraped thrombus will be dragged out of the body by the balloon 2. Compared with the method of relying solely on the balloon 2 to drag the thrombus in the prior art, the thrombus removal effect of the thrombus removal balloon can be enhanced.

[0052] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A thrombectomy balloon, characterized in that: include: Catheter (1); A balloon (2) connected to the distal end of the catheter (1) and capable of expanding outward in a radial direction relative to the catheter (1); A sliding ring (3) is slidably connected to the catheter (1) along the axial direction of the catheter (1), and the sliding ring (3) is located at the proximal end of the balloon (2); The barb assembly (4) comprises a barb bracket (41) whose proximal end is connected to the sliding ring (3) and whose distal end is connected to the balloon (2); the barb bracket (41) has a collapsed state in which it is collapsed to the outer periphery of the catheter (1) before the balloon (2) is expanded or after pressure relief, and an expanded state in which the distal end is expanded radially outward relative to the catheter (1) under the thrust of the radial expansion of the balloon (2); the barb bracket (41) is provided with spikes (42) suitable for scraping thrombi; The spike (42) is connected to the barb bracket (41) by rotating around a fixed axis (43). During the process of rotating around the fixed axis (43), the spike (42) has a lying state in which the tip portion (421) is accommodated inside the barb bracket (41) or the tip portion (421) lies flat on the surface of the barb bracket (41), and an erected state in which the tip portion (421) is arranged at an angle to the length direction of the barb bracket (41) and extends outward from the surface of the barb bracket (41); when the spike (42) is in the erected state, the spike (42) is suitable for scraping off thrombus.

2. The thrombectomy balloon according to claim 1, characterized in that: The barb assembly (4) is arranged in plurality around the circumference of the catheter (1); the proximal ends of the plurality of barb brackets (41) are rotatably connected to the sliding ring (3), and the distal ends of the plurality of barb brackets (41) are connected to different positions on the circumference of the balloon (2).

3. The thrombectomy balloon according to claim 1, characterized in that: A plurality of the spikes (42) are arranged along the length direction of the barb bracket (41).

4. The thrombectomy balloon according to claim 1, characterized in that: When the spike (42) is in the erected state, the tip portion (421) of the spike (42) is located at the proximal end of the spike (42).

5. The thrombectomy balloon according to claim 1, characterized in that: When the barbed stent (41) is in the retracted state, the spikes (42) are in the lying state; when the barbed stent (41) is expanded from the retracted state to the expanded state as the balloon (2) radially expands, the spikes (42) are synchronously rotated from the lying state to the erected state.

6. The thrombectomy balloon according to claim 5, characterized in that: The barb bracket (41) is connected to a transmission member, the length direction of the transmission member is the same as the length direction of the barb bracket (41), and the transmission member is transmission-connected to the spike (42); the proximal end of the sliding ring (3) is provided with a fixing ring (5) fixed to the outer periphery of the catheter (1), and an elastic member (6) is connected between the proximal end of the transmission member and the fixing ring (5); When the barb bracket (41) is in a retracted state, the elastic member (6) is in an elastically compressed state, and the spike (42) is in the lying state under the thrust of the transmission member; When the barbed stent (41) expands from the collapsed state to the expanded state along with the radial expansion of the balloon (2), the proximal end of the barbed stent (41) slides along the axial direction of the catheter (1) toward the distal end along with the sliding ring (3), the elastic member (6) is stretched from the elastic compression state to the elastic stretching state, and the spike (42) rotates from the lying state to the standing state under the pulling force of the transmission member; When the barbed bracket (41) is contracted from the expanded state to the contracted state as the balloon (2) is depressurized, the proximal end of the barbed bracket (41) slides axially toward the proximal end along the catheter (1) along with the sliding ring (3), the elastic member (6) is compressed from the elastically stretched state to the elastically compressed state, and the spike (42) is rotated from the upright state to the lying state under the thrust of the transmission member.

7. The thrombectomy balloon according to claim 6, characterized in that: The barb bracket (41) is provided with a groove (411), the length direction of the groove (411) is arranged along the length direction of the barb bracket (41), the fixed shaft (43) is connected to the groove side wall of the groove (411), and the transmission member is slidably connected to the groove bottom of the groove (411); when the spike (42) is in the lying state, the tip part (421) of the spike (42) is accommodated in the groove (411); when the spike (42) is in the standing state, the tip part (421) of the spike (42) protrudes outward from the side notch of the groove (411).

8. The thrombectomy balloon according to claim 7, characterized in that: The side notch of the groove (411) is located on the side of the barb bracket (41) facing away from the catheter (1).

9. The thrombectomy balloon according to claim 6, characterized in that: The spike (42) comprises a transmission part (422) and a tip part (421) located at opposite ends; the transmission member is a linkage rod (44), and the linkage rod (44) is fixedly connected to the transmission part (422) of the spike (42); or the transmission member is a rack (45), and the transmission part (422) is provided with a gear, and the rack (45) is meshedly connected to the gear of the spike (42).

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