Thrombus extraction balloon

Abstract

The invention discloses a thrombus extraction balloon, and belongs to the technical field of interventional therapy instruments. The balloon is connected to the far end of the catheter and can expand outwards relative to the radial direction of the catheter; the sliding ring is slidably connected to the guide pipe; the barb assembly comprises a barb support, the near end of the barb support is connected to the sliding ring, and the far end of the barb support is connected to the balloon; the barb stent has a folded state before the balloon is not expanded and an expanded state that the barb stent is expanded outwards in the radial direction under the thrust effect when the balloon is expanded in the radial direction; and spines suitable for scraping thrombus are arranged on the barb bracket. A barb assembly is additionally arranged between a balloon and a sliding ring, when the balloon expands in the radial direction, the balloon drives a barb support to expand outwards, and spines on the barb support stand up; when the catheter retracts, the spines on the barb support scrape thrombus attached to the blood vessel wall, the expanded balloon drags the thrombus out of the body through the traction effect on the thrombus, and the thrombus extraction effect of the thrombus extraction balloon can be enhanced.

Description

Technical Field

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

[0002] Thrombosis refers to the pathological process in which, under certain conditions, formed elements of blood form emboli in blood vessels, causing partial or complete blockage of blood vessels and obstruction of blood supply to corresponding parts. At present, the main treatments for thrombotic diseases include: anticoagulant, antithrombotic, thrombolytic and other drug treatments, surgical treatment and interventional treatment. For patients with old thrombosis who have poor response to medical treatment and poor collateral circulation, surgical treatment can be considered, that is, surgical removal of thrombus or resection of embolized blood vessel segment and re-anastomosis. Interventional treatment uses local thrombolysis by catheter, suction of thrombus by negative pressure of catheter, and mechanical thrombectomy by balloon, stent and other instruments.

[0003] Thrombectomy balloons are often used in interventional treatments. The latex balloon at the front end is pushed over the site with thrombus or embolism using the corresponding interventional instrument. The latex balloon is inflated until it touches the blood vessel wall, the catheter is withdrawn, and the thrombus is dragged out of the body along with the balloon.

[0004] In practice, the thrombus removal effect of existing thrombus removal balloons is not particularly ideal. How to design a thrombus removal balloon with better thrombus removal 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 that the existing thrombectomy balloon has a poor thrombectomy effect, thereby providing a thrombectomy balloon.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows: A thrombectomy balloon, comprising: catheter; A balloon connected to the distal end of the catheter and capable of expanding outwardly relative to the radial direction of the catheter; A sliding ring, slidably connected to the outer periphery of the catheter along the axial direction of the catheter, the sliding ring being located at the proximal end of the balloon; The barb assembly comprises a barb bracket having a proximal end connected to the sliding ring and a distal end connected to the balloon; the barb bracket has a collapsed state in which the barb bracket is collapsed to the outer periphery of the catheter before the balloon is expanded or after pressure relief, and an expanded state in which the distal end is expanded radially outward relative to the catheter under the thrust of the radial expansion of the balloon; the barb bracket is provided with spikes, and when the barb bracket is in the expanded state and moves proximally with the catheter as a whole, the spikes are suitable for scraping off thrombi.

[0007] Furthermore, the barb assembly is arranged in plurality around the circumference of the catheter; the proximal ends of the plurality of barb brackets are rotatably connected to the sliding ring, and the distal ends of the plurality of barb brackets are connected to different positions on the circumference of the balloon.

[0008] Furthermore, a plurality of the spikes are arranged along the length direction of the barb bracket.

[0009] Furthermore, the spike is rotatably connected to the barb bracket around a fixed axis, and during the process of rotating around the fixed axis, the spike has a lying state in which the tip portion is accommodated inside the barb bracket or the tip portion lies flat on the surface of the barb bracket, and an erecting state in which the tip portion is arranged at an angle to the length direction of the barb bracket and extends outward from the surface of the barb bracket; when the spike is in the erecting state, the spike is suitable for scraping off thrombus.

[0010] Furthermore, when the spike is in the erected state, the tip portion of the spike is located at the proximal end of the spike.

[0011] Furthermore, when the barbed stent is in a folded state, the spikes are in the lying state; when the barbed stent is expanded from the folded state to the expanded state as the balloon radially expands, the spikes are synchronously rotated from the lying state to the erected state; when the barbed stent is folded from the expanded state to the folded state as the balloon depressurizes and retracts, the spikes are synchronously rotated from the erected state to the lying state.

[0012] Further, the barb bracket is connected with a transmission member, the length direction of the transmission member is the same as the length direction of the barb bracket, and the transmission member is in transmission connection with the spike; the proximal end of the sliding ring is provided with a fixing ring fixed to the outer periphery of the catheter, and an elastic member is connected between the proximal end of the transmission member and the fixing ring; When the barb 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; When the barbed stent is expanded from the collapsed state to the expanded state along with the radial expansion of the balloon, the proximal end of the barbed stent slides along the axial direction of the catheter toward the distal end along with the sliding ring, the elastic member is stretched from the elastic compression state to the elastic stretching state, and the spikes are rotated from the lying state to the standing state under the pulling force of the transmission member; 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.

[0013] 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.

[0014] Furthermore, the side notch of the groove is located on a side of the barb bracket facing away from the catheter.

[0015] 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.

[0016] 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

[0017] 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.

[0018] Figure 1It is a schematic diagram of the thrombectomy balloon in the first embodiment of the present invention when the balloon is in a depressurized state, the barbed stent is in a retracted state, and the spikes are in a flat state; Figure 2 It is a schematic diagram of the thrombectomy balloon in the first embodiment of the present invention when the balloon is in an expanded state, the barbed stent is in an expanded state, and the spikes are in a three-dimensional state; Figure 3 for Figure 2 A cross-sectional view of Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the barbed bracket, the spikes, and the linkage rod in the first embodiment of the present invention; Figure 6 for Figure 5 A cross-sectional view of Figure 7 This is a schematic diagram of the structure of the barbed bracket, spikes, and rack in the second embodiment of the present invention; Figure 8 for Figure 7 A cross-sectional view of Fig. 9 for Figure 8 Enlarged view of point B in the middle.

[0019] Explanation of the reference numerals: 1. catheter; 2. balloon; 3. sliding ring; 4. barb assembly; 41. barb bracket; 411. groove; 42. spike; 421. tip portion; 422. transmission portion; 43. fixed shaft; 44. linkage rod; 45. rack; 5. fixed ring; 6. elastic member. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of this application, it should be understood that the terms "proximal end" and "distal end" used throughout the text refer to near and far relative to the operator. When the present invention is used, the end close to the doctor or operator is the "proximal end", that is, the end where the operator is located, and the end away from the doctor or operator is the "distal end", that is, the end where the balloon is located. The above-mentioned description of the orientation is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0022] Embodiment 1 like Figure 1-Figure 9 A thrombectomy balloon shown includes a catheter 1, a balloon 2, a sliding ring 3 and a barb assembly 4. 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 lumen of the balloon 2 is connected to the filling channel in the catheter 1; the catheter 1 is used to push the distal balloon 2 and pass over 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 and can fit the blood vessel wall well. It also has the advantages of good sealing performance, high ductility and tear resistance. After the inner lumen is filled, the balloon 2 can expand outwardly relative to the radial direction of the catheter 1 and fit the blood vessel wall. After the inner lumen is depressurized, the balloon 2 can retract inwardly relative to the radial direction of the catheter 1. The sliding ring 3 is 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 bracket 41 and a spike 42 connected to the barb bracket 41. The barb bracket 41 and the spike 42 are both rigid components. The spike 42 has a tip portion suitable for scraping thrombus. The proximal end of the barb bracket 41 is connected to the sliding ring 3, and the distal end of the barb bracket 41 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 balloon 2 when the balloon 2 is radially expanded.

[0023] 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.

[0024] In some embodiments, Figure 2As 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.

[0025] In some embodiments, in combination Figure 4 , Figure 5 and Figure 6 As shown, a groove 411 is provided on the barb bracket 41, and the length direction of the groove 411 is arranged along the length direction of the barb bracket 41. A fixed shaft 43 is connected between a pair of groove side walls of the groove 411, and the axial direction of the fixed shaft 43 is perpendicular to the length direction of the barb bracket 41. The spike 42 is connected to the barb bracket 41 by rotation around the fixed shaft 43, and the spike 42 includes a tip portion 421 and a transmission portion 422 located at both ends in the length direction. During the process of rotating around the fixed shaft 43, the spike 42 has a lying state in which the tip portion 421 is accommodated in the groove 411 of the barb bracket 41, and an erecting state in which the tip portion 421 is arranged at an angle with the length direction of the barb bracket 41 and the tip portion 421 extends outward from the side notch of the groove 411 on the barb bracket 41. When the plurality of spikes 42 are in the erecting state, the tip portion 421 of the spike 42 is located at the proximal end of the spike 42, that is, the tip portions 421 of the plurality of spikes 42 all point to the proximal end of the catheter 1. With such arrangement, when the barb bracket 41 is in a folded state and the plurality of spikes 42 are in a lying state, the tip portions 421 of the plurality of spikes 42 will not extend out of the groove 411 of the barb bracket 41, and the spikes 42 do not need to occupy additional space on the periphery of the catheter 1, thereby improving the passability of the catheter 1; when the barb bracket 41 is in an expanded state and the plurality of spikes 42 are in an erected state, the tip portions 421 of the plurality of spikes 42 extend outward from the side notches of the groove 411, thereby improving the scraping effect of the spikes 42. In other alternative embodiments, the groove 411 on the barb bracket 41 can be eliminated, at least one end of the fixed shaft 43 extends from the side surface of the barb bracket 41, and the spike 42 is rotatably connected to the outer wall of the barb bracket 41 around the fixed shaft 43. When the spike 42 is in a lying state, the tip portion 421 of the spike 42 lies flat on one side of the barb bracket 41; when the spike 42 is in an upright state, the spike 42 is arranged at an angle with the length direction of the barb bracket 41 and the tip portion 421 extends outward from the side surface of the barb bracket 41.

[0026] Furthermore, when the plurality of spikes 42 are in an erected state, the length directions of the plurality of spikes 42 are parallel and are all parallel to the length direction of the catheter 1 .

[0027] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, when the barb bracket 41 is in a folded state, the spike 42 is in a flat state; when the barb bracket 41 is unfolded from the folded state to the unfolded state with the radial expansion of the balloon 2, the spike 42 is synchronously rotated from the flat state to the upright state; when the barb bracket 41 is folded from the unfolded state to the folded state with the pressure relief and retraction of the balloon 2, the spike 42 is synchronously rotated from the upright state to the flat state. In this way, the unfolding action of the barb bracket 41 and the erecting action of the spike 42 can be synchronously realized by relying only on the radial expansion of the balloon 2, without the need to set up an additional transmission structure to drive the spike 42 to rotate around the fixed axis 43, and the overall structure is simpler. In other alternative embodiments, the rotation of the spike 42 around the fixed axis 43 can be realized by an additional transmission mechanism, that is, the unfolding and folding action of the barb bracket 41 is driven by the balloon 2, and the rotation action of the spike 42 is driven by other transmission mechanisms not associated with the balloon 2.

[0028] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, a transmission member is slidably connected to the bottom of the groove 411 of the barb bracket 41, and 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 bracket 41. The linkage rod 44 is slidably connected to the bottom of the groove 411, and one end of the linkage rod 44 extends from the proximal opening of the groove 411; the linkage rod 44 is fixedly connected to the multiple transmission parts 422 of the multiple spikes 42, and the linkage rod 44 can drive the multiple spikes 42 to rotate when sliding.

[0029] like Figure 4 , Figure 5 and Figure 6As shown, the proximal end of the sliding ring 3 is provided with a fixing ring 5 fixed on the outer periphery of the catheter 1, and an elastic member 6 is connected between the proximal ends of the multiple linkage rods 44 and the fixing ring 5. The sliding ring 3 is provided with a through hole, and the elastic member 6 passes through the through hole on the sliding ring 3 and is connected to the proximal end of the linkage rod 44. When the barb bracket 41 is in the retracted state, the elastic member 6 is in an elastic compression state, and the elastic member 6 applies a thrust toward the distal end of the catheter 1 to the linkage rod 44, and the multiple spikes 42 are in a lying state under the thrust of the linkage rod 44. When the barb bracket 41 is expanded from the retracted state to the expanded state with the radial expansion of the balloon 2, the proximal end of the barb bracket 41 slides along the axial direction of the catheter 1 toward the distal end with the sliding ring 3, and the elastic member 6 is stretched from the elastic compression state to the elastic stretching state, and the elastic member 6 applies a pulling force toward the proximal end of the catheter 1 to the linkage rod 44, and the multiple spikes 42 rotate 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 collapsed state as the balloon 2 is depressurized and contracted, the proximal end of the barbed bracket 41 slides axially toward the proximal end of the catheter 1 along 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 applies a thrust toward the distal end of the catheter 1 to the linkage rod 44, and the multiple spikes 42 rotate from the upright state to the lying state under the thrust of the linkage rod 44. In this way, by arranging a fixing ring 5 on the outer periphery of the catheter 1, and connecting an elastic member 6 with compressive elasticity and tensile elasticity between the fixing ring 5 and the linkage rod 44, before the balloon 2 is inflated, the spike 42 can be kept in a lying state under the elastic action of the elastic member 6, preventing the spike 42 from standing up and affecting the passability of the catheter 1; after the balloon 2 is inflated, the spike 42 can be kept in an upright state under the elastic action of the elastic member 6 even if it is subjected to greater external resistance, which is beneficial to improving the ability of the spike 42 to scrape off thrombus; when the balloon 2 is depressurized and retracted, the spike 42 can automatically return to a 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 is depressurized, and is convenient for withdrawing the catheter 1 as a whole from the body; the overall structure is simple and easy to implement.

[0030] In some embodiments, Figure 5 and Figure 6 As shown, the cross section of the barb bracket 41 is circular or square, the side notch of the groove 411 is located on the side of the barb bracket 41 facing away from the catheter 1, and when the spike 42 is in an erected state, the tip portion 421 of the spike 42 extends outward from the side notch of the groove 411. In other alternative embodiments, the side notch of the groove 411 can also be located on other sides of the barb bracket 41; the groove 411 can have only one side with a side notch, or both sides with side notches; when the two sides of the groove 411 are provided with side notches, correspondingly, there are two groups of barbs in the barb bracket 41, and each group of barbs can extend outward from the side notch of one of the grooves 411 during the rotation process.

[0031] 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.

[0032] Embodiment 2 like Figure 7-Figure 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.

[0033] 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.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled 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 list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the 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 the barb bracket 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); and the barb bracket (41) is provided with sharp spikes (42) suitable for scraping thrombi.

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 any one of claims 1 to 3, characterized in that: 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.

5. The thrombectomy balloon according to claim 4, 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).

6. The thrombectomy balloon according to claim 4, 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.

7. The thrombectomy balloon according to claim 6, 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.

8. The thrombectomy balloon according to claim 7, 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).

9. The thrombectomy balloon according to claim 8, 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).

10. The thrombectomy balloon according to claim 7, 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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