CN115444505A

CN115444505A - Thrombus clearing system and using method

Info

Publication number: CN115444505A
Application number: CN202211231890.8A
Authority: CN
Inventors: 武文斌; 马立金
Original assignee: Beijing Guanqiao Medical Technology Co ltd
Current assignee: Beijing Guanqiao Medical Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-09

Abstract

The application relates to the technical field of medical instruments, in particular to a thrombus removal system and a using method thereof. The thrombus removal system comprises a balloon catheter and a stent catheter which are arranged in a split mode, wherein a plugging balloon is arranged at the far end of the balloon catheter, a thrombus crushing support is arranged on the near end side of the plugging balloon and connected to the far end of the stent catheter, the balloon catheter is movably connected in the stent catheter in a penetrating mode, a suction cavity channel used for taking out crushed thrombus is arranged in the stent catheter, and the suction cavity channel is communicated with a luer connector arranged at the near end of the stent catheter. The thrombus removal system can play a role in blocking thrombus and preventing thrombus from escaping by using the blocking saccule and the thrombus crushing support together, and also can play a role in thrombus taking and crushing.

Description

Thrombus clearing system and using method

Technical Field

The application relates to the technical field of medical instruments, in particular to a thrombus removal system and a using method thereof.

Background

Thromboembolic diseases are becoming a major health problem worldwide, and studies have shown that one fourth of the global causes of hospitalization death are associated with thrombosis, and the first three cardiovascular causes of death are all associated with thrombosis and have become the first cause of death in the global population.

Pulmonary Embolism (PE) is one of three common fatal cardiovascular diseases at present, has the characteristics of high incidence, high disability rate and high mortality rate, and is serious illness and emergency of the respiratory system. More than 20 million people die from PE-related diseases annually in the united states and 54.4 million people die from related diseases annually in europe. This means that about every 6 minutes in the united states, one die from PE and about every 15 seconds in the world.

PE is the third leading cause of cardiovascular death after coronary heart disease and stroke, with a 30-day mortality rate of 30% and 11% of patients dying within the first hour after admission if untreated. In China, the incidence rate of PE is increased from 3.9/10 ten thousand in 2001 to 11.7/10 ten thousand in 2011, and relevant solutions are urgently needed in clinic.

PE therapy is an emerging field of intravascular intervention and ideal therapeutic approaches are currently being actively explored to address this life-threatening disease. An ideal PE treatment device should have these characteristics: can be used by one operator; bleeding and perioperative risks are minimal; effectively solving the clotting; and minimal blood loss.

Interventional treatment of acute pulmonary embolism mainly includes catheter thrombolysis and catheter-based thrombectomy/resection. Over a period of 20 years, treatment regimens have evolved from drug thrombolysis to current mechanical embolectomy for thrombi in the arterial system, such as clots in the cerebral vasculature. At present, clinical determination has been made that cerebrovascular stent intervention thrombus removal becomes a recommended nursing method in guidelines, and direct mechanical thrombus removal is expected to break through the tradition of 'firstly dissolving thrombus and then removing thrombus'.

Disclosure of Invention

The application aims at providing a thrombus clearing system and a using method, the thrombus clearing system is simple in structure and convenient and fast to operate, thrombus is easy to take out and break, the thrombus is prevented from escaping, and a good thrombus clearing effect can be achieved.

In order to achieve the above object, in a first aspect, the present invention provides a thrombus removal system, which includes a balloon catheter and a stent catheter, which are separately arranged, wherein a distal end of the balloon catheter is provided with an occlusion balloon, a proximal end side of the occlusion balloon is provided with a thrombus crushing support, the thrombus crushing support is connected to a distal end of the stent catheter, the balloon catheter is movably connected in the stent catheter in a penetrating manner, a suction channel for taking out a crushed thrombus is arranged in the stent catheter, and the suction channel is communicated with a luer connector arranged at a proximal end of the stent catheter.

In an alternative embodiment, the plug bracket comprises an elastically deformable mesh bracket, a release outer tube for expanding or contracting the plug bracket is movably sleeved outside the bracket conduit, and a push-pull head is connected to the proximal end of the release outer tube.

In an optional embodiment, a fixing short pipe is connected to the thrombus support, the proximal end of the fixing short pipe is fixedly connected with the support catheter, and the distal end of the fixing short pipe is of an open structure and has a gap with the balloon catheter.

In an optional embodiment, a balloon branch for the balloon catheter to extend into is arranged on the luer connector, and a balloon cavity channel is arranged in the stent catheter and communicated with the balloon branch.

In an optional embodiment, a balloon joint is connected to the proximal end of the balloon catheter, and the balloon joint is exposed out of the balloon branch and comprises a guide wire port and a pressurizing and pressure-releasing port respectively.

In an optional embodiment, the balloon catheter comprises a double-cavity tube, a pressurizing and pressure-releasing cavity and a guide wire cavity are respectively arranged in the double-cavity tube, the guide wire cavity is connected with a guide wire tube penetrating through the blocking balloon, and the pressurizing and pressure-releasing cavity is hermetically connected with the near end of the blocking balloon.

In an alternative embodiment, a developing ring is mounted on the guidewire tube, and the developing ring is arranged inside the occlusion balloon;

the distal ends of the fixed short pipe and the release outer pipe respectively comprise a developing pipe.

In an alternative embodiment, the luer connector comprises an aspiration orifice, the aspiration channel is connected with the aspiration orifice, and an aspirator for aspirating the broken thrombus is connected with the aspiration orifice.

In an optional embodiment, a standby channel is further arranged in the stent catheter, a standby branch is arranged on the luer connector, and the standby channel is communicated with the standby branch.

In a second aspect, the invention provides a method of using a thrombectomy system according to any of the preceding embodiments, comprising the steps of:

placing the crushed thrombus stent in a compressed state at the far end of the thrombus through a stent catheter under the guide action of a guide wire;

releasing the thrombus stent, and conveying the plugging saccule to the far end of the thrombus stent along the suction cavity of the stent catheter;

pressurizing in the balloon catheter to enable the plugging balloon to plug the far end of the blood vessel;

connecting an aspirator to the luer connector, pulling the broken thrombus support backwards, and opening the aspirator to aspirate and remove thrombus in the blood vessel cavity after the broken thrombus support is broken;

under the opening state of the aspirator, the thrombus stent and the stent catheter are withdrawn from the human body, and then the thrombus stent and the stent catheter are stretched into the blood vessel again;

and after the operations are repeated for 2-3 times, the plugging saccule releases pressure, and the plugging saccule, the thrombus crushing support and the guide wire are withdrawn from the human body.

The balloon catheter can be movably connected in the stent catheter in a penetrating mode, and the balloon catheter and the stent catheter are arranged in a split mode, so that the independent placement of the thrombus crushing stent and the plugging balloon in a blood vessel cavity can be formed.

The sacculus pipe movably cross-under can stretch into the distal end of garrulous bolt support through the support pipe with the sacculus pipe after garrulous bolt support gets into the blood vessel chamber and inflation location, and then can make the shutoff sacculus after the inflation carry out the shutoff to the blood vessel distal end, prevents the escape of thrombus in the blood vessel chamber, makes the thrombus of shutoff sacculus near-end side clear away fully more.

After the thrombus in the blood vessel is broken by the broken thrombus stent, the broken thrombus is sucked out of the body through a suction cavity in the stent catheter. The suction cavity is communicated with the luer connector positioned outside the body, and the suction device can be connected to the luer connector to extract negative pressure from the blood vessel cavity, so that the thrombus is thoroughly removed.

The thrombus removal system can play a role in blocking thrombus and preventing thrombus from escaping by using the blocking saccule and the thrombus breaking support together, can play a role in taking thrombus and breaking thrombus, can play an independent role in using the three instruments of the thrombus breaking support, the blocking saccule and the guide wire by using the proximal luer connector and the support catheter together, can more efficiently, quickly and conveniently suck thrombus in a blood vessel after the completion of the thrombus breaking through the luer connection by connecting the suction cavity channel with the luer connector, and has a cleaner and more thorough suction effect, thereby effectively treating pulmonary embolism.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view of the overall construction of a thrombectomy system according to the present application;

FIG. 2 is a schematic view of the structure of a stent, stent catheter and luer fitting of the present application;

FIG. 3 is a schematic view of the crushed thrombus support in a compressed state and the release catheter and crushed thrombus support of the present application;

FIG. 4 is a schematic structural view of an occlusion balloon, a balloon catheter, and a balloon connector of the present application;

FIG. 5 is a schematic view of the internal structure of a balloon catheter of the present application;

fig. 6 is a schematic view of the internal structure of the stent catheter in the present application.

Icon:

1-balloon catheters; 11-balloon joint; 12-a guide wire port; 13-pressurizing and pressure-releasing port; 14-pressurizing and pressure-releasing cavity channel; 15-guide wire lumen; 16-a guide wire tube; 17-a developing ring;

2-a stent catheter; 21-suction lumen; 22-fixing short pipes; 23-balloon lumen; 24-a spare lumen;

3-blocking the balloon;

4-breaking the thrombus support;

a 5-luer fitting; 51-balloon branch; 52-suction nozzle; 53-backup leg;

6-releasing the outer tube; 61-pushing the slider;

7-a developing tube;

8-an aspirator.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The thrombus removal system in the application mainly removes thrombus in a blood vessel in a mode of combining stent thrombus breaking and suction removal, and is different from the existing stent thrombus removal process.

In the prior art, stent thrombus removal is one of effective means for treating vascular embolism, a stent thrombus removal stent is placed at a thrombus part through a catheter by adopting a minimally invasive interventional therapy method, the stent and the thrombus are combined together after several minutes, the thrombus blocking the blood vessel is directly grabbed, the thrombus is pulled out of the blood vessel, the blocked blood vessel is communicated, and the stent thrombus removal has the advantages of small wound, quick response and thorough curative effect compared with other treatment means.

The two treatment methods have obvious curative effect on new thrombus and have the defect that old massive thrombus is difficult to completely remove, but pulmonary artery embolism is subacute thrombus or old thrombus. The stent embolectomy can effectively remove old thrombus and has the advantages of high efficiency, short operation time, low risk of distal embolism and few complications.

The thrombus clearing system is improved on the basis of stent thrombus taking, specifically, firstly, thrombus in a blood vessel is broken through a stent, then the broken thrombus is sucked to the outside of the body through a catheter in a negative pressure suction mode, compared with stent thrombus taking, the thrombus combined on the stent can be prevented from falling into the blood vessel again in the process of being pulled out of the blood vessel, the thrombus in the blood vessel can be removed more completely through the suction mode, the blood vessel is further blocked through a balloon arranged at the far end of the thrombus through the far end of the blood vessel during suction, the suction action force is ensured to enhance the suction removal effect, and meanwhile, the thrombus is prevented from escaping from the far end of the blood vessel.

Referring to fig. 1, the thrombus removal system according to the present invention includes a main structure including a balloon catheter 1 and a stent catheter 2 which are separately provided, and the balloon and the stent can be separately and independently placed in a blood vessel by the separate arrangement of the balloon catheter and the stent. In specific operation, the stent can be placed at the far-end part of thrombus in a blood vessel through the stent catheter 2, then the balloon catheter 1 penetrates through the stent, and the balloon extends into the far end of the blood vessel, so that the far end of the blood vessel can be conveniently plugged through the inflated balloon.

Specifically, the distal end of the balloon catheter 1 is provided with the occlusion balloon 3, the proximal end side of the occlusion balloon 3 is provided with the thrombus support 4, the thrombus support 4 is arranged at the distal end of the stent catheter 2, the thrombus support 4 can be placed at the distal end of thrombus through the stent catheter 2, and the occlusion balloon 3 before being inflated can extend out of the distal end of the stent catheter 2 in combination with the mode that the balloon catheter 1 is movably connected in the stent catheter 2 in a penetrating manner.

In the invention, the balloon catheter 1 and the stent catheter 2 are not connected, after the thrombus stent 4 is stretched into and positioned, the balloon catheter 1 can pass through the inside of the stent catheter 2, and drives the blocking balloon 3 before being pressurized to reach the position at the far end of the thrombus stent 4.

In a particular use, the crushed thrombus stent 4 is first delivered through the stent catheter 2 to the distal end of the thrombus site, and then the crushed thrombus stent 4 is expanded at the thrombus distal end site. And then the blocking saccule 3 before being pressurized is conveyed to the far end of the thrombus support 4 through the saccule catheter 1, specifically, the saccule catheter 1 drives the blocking saccule 3 before being pressurized to extend out from the opening at the far end of the support catheter 2 and extend a distance forward to the far end of the thrombus support 4, and the blocking saccule 3 is pressurized, so that the expanded blocking saccule 3 blocks the far end of the blood vessel and prevents thrombus from escaping from the far end of the blood vessel.

The thrombus in the blood vessel is broken by moving the thrombus breaking support 4 in the blood vessel, and further, the thrombus breaking support 4 is moved backwards along the blood vessel cavity to scrape and break the thrombus in the blood vessel. The stent catheter 2 is internally provided with an aspiration channel 21 for taking out the broken thrombus, the proximal end of the stent catheter 2 is connected with a luer connector 5, the luer connector 5 is provided with an aspiration tube orifice 52, the aspiration channel 21 is particularly communicated and connected with the aspiration tube orifice 52, in the aspiration process, the aspiration tube orifice 52 is connected with an aspirator 8, and the broken thrombus is aspirated and removed to the outside of the body through the aspiration channel 21 under the action of the aspiration negative pressure provided by the aspirator 8.

Referring to fig. 2-3, based on the expansion of the stent 4 at the distal site of the thrombus as described above, in one embodiment, the stent 4 comprises a compressed state and an expanded state, and the stent 4 is delivered to the distal site of the thrombus in the blood vessel in the compressed state and expands by releasing it after reaching the set site.

In particular, the morcellating stent 4 comprises an elastically deformable mesh stent that is retractable along the same path of expansion set. The outer releasing pipe 6 for expanding or contracting the broken bolt support 4 is movably sleeved on the outer side of the support guide pipe 2, the broken bolt support 4 in a compressed state is contracted and laid in the outer releasing pipe 6 in the conveying process, and when the broken bolt support 4 needs to be expanded and expanded, the outer releasing pipe 6 is withdrawn to be separated from the constraint of the broken bolt support 4. Meanwhile, when the bracket 4 needs to be compressed again, the release outer tube 6 can be pushed forward again, so that the bracket 4 returns to the compressed state again along the same deformation track.

In order to conveniently control the state change of the broken bolt support 4, a push-pull head 61 is connected to the proximal end of the release outer tube 6, the push-pull head 61 is arranged outside the body, and the push-pull operation can be conveniently carried out, so that the state of the broken bolt support 4 can be changed. Meanwhile, thrombus adsorbed on the mesh stent can be effectively broken in the compression and expansion transformation by the reciprocating push-pull of the push-pull head 61 on the release outer tube 6, the generation of large-size thrombus is reduced, and the mesh stent and the suction channel are prevented from being blocked by the large-size thrombus.

The mesh-shaped stent structure of the thrombus crushing stent 4 in the embodiment can allow the crushed thrombus to pass through and enter the suction channel 21 in the stent catheter 2, and meanwhile, based on the movable penetration of the balloon catheter 1 in the stent catheter 2, the thrombus can also enter the suction channel 21 through an annular gap between the distal end of the stent catheter 2 and the balloon catheter 1, so that the crushed thrombus can be fully cleared through the suction channel 21.

Meanwhile, in order to enable the crushed thrombus support 4 to be reliably conveyed into a blood vessel along with the stent catheter 2, the crushed thrombus support 4 is fixed at the tail end of the stent catheter 2, a fixing short pipe 22 is connected to the crushed thrombus support 4, the near end of the fixing short pipe 22 is welded and fixed with the stent catheter 2 and used for fixing the crushed thrombus support 4 on the stent catheter 2, the far end of the fixing short pipe 22 is of an open structure, and a gap is reserved between the fixing short pipe 22 and the balloon catheter 1 to form an annular gap between the far end of the stent catheter 2 and the balloon catheter 1. The arrangement mode ensures the connection reliability of the stent catheter 2 in the conveying and deformation processes, and expands the three-dimensional space of thrombus entering the suction cavity 21 on the stent catheter 2.

Referring to fig. 4, in another specific embodiment, a balloon branch 51 for the balloon catheter 1 to extend into is provided on the luer connector 5, a balloon channel 23 for the balloon catheter 1 to penetrate into is provided in the stent catheter 2, and the balloon channel 23 is communicated with the balloon branch 51. During the threading process of the balloon catheter 1, the distal end of the balloon catheter 1 enters from the balloon branch 51 on the luer connector 5 and extends into the balloon channel 23 in the stent catheter 2.

Further, a balloon joint 11 is connected to the proximal end of the balloon catheter 1, and in the use process, the balloon joint 11 is exposed out of the balloon branch 51 and includes a guidewire port 12 and a pressure charging and releasing port 13, respectively. Specifically, the balloon joint 11 is arranged outside the body, and the threading of the guide wire and the pressure charging and releasing operation of the occlusion balloon 3 are facilitated through the guide wire port 12 and the pressure charging and releasing port 13.

With reference to fig. 5 to 6, the balloon catheter 1 in this embodiment includes a dual-lumen tube, a pressurizing and pressure-releasing lumen 14 and a guidewire lumen 15 are respectively disposed inside the dual-lumen tube, the guidewire lumen 15 is hermetically connected to a guidewire tube 16 passing through the occlusion balloon 3, and the pressurizing and pressure-releasing lumen 14 is hermetically connected to a proximal end of the occlusion balloon 3, so as to ensure that the balloon catheter 1 reaches a lesion site under the guiding action of a guidewire and ensure normal pressure-releasing of the occlusion balloon 3.

It should be pointed out that, in the process of inserting the stent catheter 2 into the blood vessel, the tail end of the guide wire can be inserted into the balloon cavity 23 of the stent catheter 2 and pass out of the balloon branch 51 from the tail end of the guide wire, so that after the stent catheter 2 enters the blood vessel cavity under the guide action of the guide wire, the guide wire can be reliably guided in the process of inserting the subsequent balloon catheter 1, thereby ensuring that the stent catheter 2 and the balloon catheter 1 reliably enter the blood vessel cavity under the action of the same guide wire.

A developing ring 17 is attached to the guidewire tube 16, and the developing ring 17 is disposed inside the occlusion balloon 3. Meanwhile, the distal ends of the fixing stub 22 and the release outer tube 6 include the developing tube 7, respectively. Through the setting mode, can fix a position sacculus pipe 1, support pipe 2 and release outer tube 6 accurately reliably, when satisfying each pipe fitting normal input vascular chamber, judge the relative position relation of shutoff sacculus 3, bits of broken glass support 4 and release outer tube 6 effectively to do benefit to and carry out the deformation of blood vessel distal end shutoff operation and bits of broken glass support 4 between compression and expansion.

In one preferred embodiment, the luer connector 5 comprises an aspiration nozzle 52, the aspiration channel 21 is hermetically connected with the aspiration nozzle 52, and an aspirator 8 for aspirating the broken thrombus is connected to the aspiration nozzle 52. The aspirator 8 in the embodiment is lockably connected to the suction nozzle 52, and when suction operation is required, the aspirator 8 is locked with the suction nozzle 52, the aspirator 8 is opened, and the applied suction negative pressure is ensured to be sufficiently and reliably applied to the blood vessel cavity by combining the occlusion balloon 3 at the far end of the blood vessel.

The stent catheter 2 is also provided with a standby cavity channel 24, the luer connector 5 is provided with a standby branch 53, and the standby cavity channel 24 is communicated with the standby branch 53 in a sealing way. The function in the suction operation can be expanded by the provided standby cavity channel 24, and the actual requirement of specific thrombus suction is met.

When the aspirator 8 is operated, the balloon branch 51 and the standby branch 53 on the luer connector 5 need to be blocked, so that air is prevented from entering and leaking from the balloon branch 51 and the standby branch 53, and the action effect of the suction force generated by the aspirator 8 is enhanced.

In addition to the thrombus removal system, the invention also provides a use method of the thrombus removal system for removing thrombus in a blood vessel cavity. The method specifically comprises the following steps:

under the guiding action of the guide wire, the stent catheter 2 is stretched into the blood vessel, and the crushed thrombus stent 4 in a compressed state passes through the thrombus part through the stent catheter 2 and is placed at the far end of the thrombus;

after the thrombus stent 4 reaches a predetermined position, the releasing outer tube 6 is withdrawn, so that the releasing outer tube 6 releases the restraint on the thrombus stent 4, the thrombus stent 4 is released, and the plugging saccule 3 is conveyed to the far end of the thrombus stent 4 along the suction cavity 21 of the stent catheter 2;

after the balloon catheter 1 reaches a predetermined position, the far end of the blood vessel is blocked by the blocking balloon 3 through pressurizing in the pressurizing and pressure-releasing cavity channel 14 in the balloon catheter 1, so that thrombus is prevented from escaping from the far end of the blood vessel;

after the operation is finished, the aspirator 8 is locked and connected on the aspirator pipe orifice 52 of the luer connector 5, so that the aspirator 8 is screwed and connected on the aspirator pipe orifice 52, and the reliable sealing of the connection part is ensured;

the thrombus breaking support 4 is withdrawn along the blood vessel cavity, the thrombus is broken, the thrombus is scraped, the aspirator 8 is opened while the thrombus breaking support 4 is pulled backwards, and the thrombus broken by the thrombus breaking support 4 in the blood vessel cavity is aspirated and removed;

withdrawing the thrombus stent 4 and the stent catheter 2 out of the human body, simultaneously opening the aspirator 8, crushing and aspirating thrombus in the withdrawn blood vessel, and then extending the thrombus stent 4 and the stent catheter 2 into the blood vessel cavity again to block the proximal part of the balloon 3;

repeating the suction operation for 2-3 times to completely remove thrombus in the blood vessel;

after the suction is finished, the blocking saccule 3 is decompressed, and the blocking saccule 3, the thrombus stent 4 and the guide wire are withdrawn from the human body along the vascular cavity.

The thrombus clearing system and the use method thereof can effectively and thoroughly clear thrombus in pulmonary artery and ensure that pulmonary embolism is treated timely, effectively and reliably.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a thrombus clearance system, its characterized in that, is including sacculus pipe and the support pipe that the components of a whole that can function independently set up, the distal end of sacculus pipe is provided with the shutoff sacculus, the near-end side of shutoff sacculus is provided with the broken thrombus support, the broken thrombus leg joint is in the distal end of support pipe, sacculus pipe movably wears to connect in the support pipe, be provided with in the support pipe and be used for taking out the suction chamber way of broken back thrombus, suction chamber way and setting are in luer joint near-end of support pipe communicates with each other.

2. The thrombus removal system according to claim 1, wherein the thrombus support comprises an elastically deformable mesh support, a release outer tube for expanding or contracting the thrombus support is movably sleeved outside the support catheter, and a pushing head is connected to a proximal end of the release outer tube.

3. The thrombus removal system according to claim 2, wherein a fixing short tube is connected to the thrombus support, a proximal end of the fixing short tube is fixedly connected to the support catheter, and a distal end of the fixing short tube has an open structure and is spaced from the balloon catheter.

4. The thrombus removal system according to any one of claims 1 to 3, wherein a balloon branch for the balloon catheter to extend into is provided on the luer connector, and a balloon channel is provided in the stent catheter and is communicated with the balloon branch.

5. The thrombus removal system according to claim 4, wherein a balloon connector is connected to a proximal end of the balloon catheter, and the balloon connector is exposed to the balloon branch and comprises a guidewire port and a pressure-charging and pressure-releasing port, respectively.

6. The thrombus removal system according to claim 3, wherein the balloon catheter comprises a double-lumen tube, a pressurizing and pressure-releasing lumen and a guide wire lumen are respectively arranged in the double-lumen tube, the guide wire lumen is connected with a guide wire tube passing through the blocking balloon, and the pressurizing and pressure-releasing lumen is hermetically connected with the proximal end of the blocking balloon.

7. The thrombectomy system of claim 6, wherein said guidewire tube has a visualization ring mounted thereon, said visualization ring being disposed inside said occlusion balloon;

8. The thrombus removal system of claim 4, wherein the luer connector comprises an aspiration orifice to which the aspiration lumen is connected, and an aspirator for aspirating the fragmented thrombus is connected to the aspiration orifice.

9. The thrombus removal system of claim 4, wherein a backup lumen is further provided in the stent catheter, a backup branch is provided on the luer connector, and the backup lumen is in communication with the backup branch.

10. A method of using the thrombectomy system of any of claims 1-9, comprising the steps of:

releasing the crushed thrombus stent, and conveying the plugging saccule to the far end of the crushed thrombus stent along the suction cavity of the stent catheter;