CN110680457A - Thrombus removing system - Google Patents

Abstract

The embodiment of the present invention provides a thrombus removal system. By disposing a retractable and inflatable blood vessel blocking mechanism at the head end of the communication catheter, the system can closely adhere to the blood vessel wall when the blood vessel blocking mechanism is in a released state. Temporary occlusion of the blood vessel can prevent the blood flow in the blood vessel from impacting the thrombus. By setting a retractable and expandable thrombus capture mechanism on the traction guide wire, the blood vessel can be blocked when the thrombus capture mechanism is in a released state. The wall is fully supported and expanded, which is conducive to the capture of thrombus. By setting a retractable and inflatable debris interception mechanism at the distal end of the traction guide wire, when the debris interception mechanism is in a released state, the thrombus debris in the blood can be removed. It is filtered and removed to prevent it from flowing to the distal position of the blood vessel, which is in line with the needs of clinical use.

Description

A thrombus removal system

technical field

The invention belongs to the technical field of vascular disease treatment devices, and in particular relates to a thrombus removal system.

Background technique

Thrombosis is a blood coagulation formed by abnormal aggregation of red blood cells, platelets, fibrin and white blood cells in the blood according to different proportions in the pathological conditions of the secondary endogenous or extrinsic coagulation system. piece. Thrombosis can not only form in blood vessels in any part of the body, but also spread throughout various tissues and organs of the human body. Thrombosis will cause vascular occlusion and blood flow obstruction, causing ischemia or even necrosis of related tissues and organs, resulting in symptoms of corresponding tissue and organ dysfunction. Cardiovascular diseases such as large-area myocardial infarction, arteriovenous lumen occlusion and ischemic stroke caused by thrombosis have become common clinical diseases and frequently-occurring diseases, and have caused extremely high fatalities to a large number of patients. rate and disability rate.

In view of the above clinical problems, drug thrombolysis was mostly used for treatment in the early stage, but this method is only suitable for small thrombus, and the treatment effect on large-volume thrombus occlusion is very unsatisfactory. Low recanalization rate, long lumen recanalization time and poor prognosis, and usually only about 3-5% of patients are suitable for drug thrombolysis. In recent years, mechanical thrombectomy has become a key research direction in the field of thrombus treatment. This method is to deliver a thrombectomy device to the vicinity of the thrombus, and then capture and remove the thrombus through the thrombectomy device. The mechanical thrombectomy method has the advantages of short operation time, less related complications, complete thrombus removal and good prognosis. However, most of the thrombectomy devices currently used in clinical practice are single-layer stent structures, which not only have better thrombus capture efficiency In addition, during the thrombectomy operation, the thrombus needs to be fixed by repeated pushing and pulling, which makes the block thrombus easily form fragments and fall off and flow to the distal position of the blood vessel, which greatly increases the risk of vascular reocclusion in patients.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the embodiments of the present invention provide a thrombus removal system. When the system works, the blood vessel blocking mechanism, the thrombus catching mechanism and the debris blocking mechanism cooperate with each other, and when the system works, Under the auxiliary positioning of the imaging link, the thrombus and thrombus fragments can be completely removed. Embodiments of the present invention also provide a method for using the thrombus removal system.

To achieve the above object, the embodiment of the present invention adopts the following technical solutions:

A thrombus removal system comprising:

recovery catheter;

a transmission conduit, which is movably sleeved in the recovery conduit;

a communication conduit, which is movably sleeved in the transmission conduit;

a pulling guide wire, the pulling guide wire is arranged on the central axis in the communication conduit, moves in the direction of the central axis relative to the communication conduit, and the pulling guide wire has two ends, a pulling end and a pushing end;

a blood vessel blocking mechanism, the blood vessel blocking mechanism is fixedly arranged at the head end of the communication conduit, and the blood vessel blocking mechanism is a contractible and inflatable balloon structure;

A thrombus capturing mechanism, the thrombus capturing mechanism is fixedly arranged on the traction guide wire, between the advancing end and the blood vessel blocking mechanism, and the thrombus capturing mechanism is a retractable and expandable mesh body structure;

a debris intercepting mechanism, the debris intercepting mechanism fixedly disposed at the distal end of the pulling guide wire, the debris intercepting mechanism being a collapsible and expandable basket structure; and

The developing link is fixedly wound on the communicating conduit and the pulling wire.

In the above-mentioned thrombus removal system, the recovery catheter, the transmission catheter, the communication catheter, the traction guide wire, the blood vessel blocking mechanism, the thrombus capturing mechanism, the debris intercepting mechanism and the developing link may be arranged coaxially. In the non-working state, the above mechanisms are all retracted in the recovery catheter. In the working state, the recovery catheter including the transmission catheter, the communication catheter and the traction guide wire is sent along the blood vessel to the vicinity of the thrombus through the control device, the recovery catheter is locked by the control device, and the transmission catheter including the communication catheter and the traction guide wire is pushed and threaded. After passing through the thrombus, the traction guide wire is locked by the control device, and under the auxiliary positioning of the developing link, the communication catheter is withdrawn to an appropriate distance, so that the blood vessel blocking mechanism set on the communication catheter and the thrombus set on the traction guide wire can catch the thrombus. The trapping mechanism can be precisely positioned at both ends of the thrombus, and then the communication catheter and the traction guide wire are locked by the control device, and the transmission catheter is withdrawn to the outlet of the recovery catheter, so that the blood vessel blocking mechanism arranged at the head end of the communication catheter is set in the traction guide. The thrombus capturing mechanism on the wire and the fragment intercepting mechanism arranged at the distal end of the pulling wire are sequentially released into the blood vessel.

The vascular occlusion mechanism is a balloon structure, which is in the shape of a tube when it contracts and a spherical shape when it expands. When the vascular occlusion mechanism is released into the blood vessel, it can be closely attached to the blood vessel wall and temporarily block the blood vessel, which can prevent The blood flow in the blood vessel impacts the thrombus, so that the thrombus is easily captured by the thrombus capturing mechanism.

The thrombus capturing mechanism is a mesh structure, which is in the shape of a network tube when it is contracted, and a round fusiform when it is expanded. When the blood vessel capturing mechanism is released into the blood vessel, it can fully support and expand the blood vessel wall, which is conducive to the capture of the thrombus. catch.

The debris intercepting mechanism is a basket structure, which is in the shape of a network tube when it is contracted and a circular pocket when it is expanded. When the debris intercepting mechanism is released into the blood vessel, it can filter and remove the thrombus debris in the blood to prevent it from flowing to the distal end of the blood vessel. Location.

The connecting catheter is locked by the control device and the guide wire is pulled, and the liquid such as normal saline is injected into the blood vessel blocking mechanism at the head end of the connecting catheter. The flow impinges on the thrombus, thereby facilitating the capture of the thrombus by the thrombus capture mechanism.

The retraction catheter, the transmission catheter and the communication catheter are locked by the control device, and the pulling guide wire is slowly withdrawn. At the same time, the debris intercepting mechanism arranged at the distal end of the pulling guide wire filters and removes the thrombus debris to prevent it from flowing to the distal end of the blood vessel.

The recovery catheter and the transmission catheter are locked by the control device, and the liquid such as normal saline in the vascular occlusion mechanism connected to the head end of the catheter is drawn out to make it contract, and at the same time, the retraction guide wire is continued to be withdrawn, so that the thrombus capturing mechanism arranged on the retraction guide wire is pulled out. The thrombus is completely embedded and captured by the thrombus capturing mechanism, and the thrombus fragments are also filtered and removed by the debris intercepting mechanism.

The recovery catheter is locked by the control device, and the transmission catheter, the communication catheter, the vessel blocking mechanism, the thrombus capturing mechanism and the captured thrombus, the debris intercepting mechanism and the filtered thrombus fragments are withdrawn into the recovery catheter in sequence.

Through the control device, the thrombus removal system is smoothly withdrawn to the outside of the body, and the removal of thrombus and thrombus fragments is completely completed, so that the blood flow in the blood vessel returns to a normal operating state.

The functions of the developing link mainly include the following three points: (1) The developing link can precisely locate the vessel blocking mechanism, thrombus capturing mechanism and debris intercepting mechanism in the thrombus removal system. Under X-rays, the positions of the vascular occlusion mechanism, the thrombus capture mechanism and the debris interception mechanism in the blood vessel can be clearly observed, and the operator can accurately and thoroughly complete the removal of thrombus and thrombus fragments; (2) using The developing link is wound around the communicating catheter, which can not only significantly increase the overall pushing and pulling ability of the communicating catheter, but also improve the connection strength between the vascular occlusion mechanism and the communicating catheter, which can more effectively enhance the safety of the thrombus removal system in use. (3) The developing link is wound on the traction guide wire, which can not only significantly increase the overall pushing and pulling ability of the traction guide wire, but also improve the connection strength of the thrombus capturing mechanism, the debris intercepting mechanism and the traction guide wire. , can more effectively enhance the safety of the thrombus removal system when used.

Preferably, the balloon structure is in the shape of a tube when it is contracted, and in a spherical shape when it is expanded. The function is that when the vascular blocking mechanism is released into the blood vessel, it can be closely attached to the blood vessel wall and temporarily block the blood vessel, which can prevent the blood flow in the blood vessel from impacting the thrombus, thereby facilitating the thrombus capturing mechanism to capture the thrombus.

Further preferably, the capsule structure is a polymer layer, and the polymer layer includes a polyvinyl chloride layer, a polyurethane layer, a nylon layer, a PET layer, a PEBAX layer, and the like.

Further preferably, when the balloon structure is released into the blood vessel, it is inflated by injecting a liquid such as physiological saline into it and closely adheres to the blood vessel wall.

Preferably, the mesh structure is in the shape of a network tube when it shrinks, and is in the shape of a round shuttle when it expands. The function is that when the vessel capturing mechanism is released into the blood vessel, the vessel wall can be fully supported and expanded, which is beneficial to capturing the thrombus.

Further preferably, the mesh structure is a wire mesh, and the wire mesh includes a stainless steel mesh, a nickel-titanium alloy mesh, a cobalt-chromium alloy mesh, a tantalum alloy mesh, a titanium alloy mesh, and the like.

Further preferably, when the mesh structure is released into the blood vessel, the mesh area of the proximal part is larger, and the mesh area of the distal part is smaller, so as to have better embedding and fixation when capturing the thrombus. effect.

Preferably, the basket structure is in the shape of a network tube when it is contracted, and is in the shape of a round pocket when it is expanded. The function is that when the debris blocking mechanism is released into the blood vessel, the thrombus debris in the blood can be filtered and removed to prevent it from flowing to the distal position of the blood vessel.

Further preferably, the basket body structure is a wire basket, and the wire basket includes a stainless steel basket, a nickel-titanium alloy basket, a cobalt-chromium alloy basket, a tantalum alloy basket, a titanium alloy basket, and the like.

Further preferably, the surface of the wire basket is covered with a polymer film, and the polymer film includes a polyurethane film, a polycarbonate film, a polypropylene film, a polytetrafluoroethylene film, a nylon film, and the like.

More preferably, the polymer film is uniformly distributed with circular holes with a diameter of 80-160 μm.

The function of evenly setting round holes on the polymer membrane is to filter and intercept the thrombus fragments in the blood after being screened by the round holes, but it can allow the blood to circulate normally through the round holes.

Preferably, the developing link includes a first developing link, a second developing link and a third developing link.

Further preferably, the material of the developing link includes gold or its alloy, platinum or its alloy, tungsten or its alloy, and tantalum or its alloy.

Further preferably, the first developing link is arranged on the communication conduit at the proximal end of the vessel blocking mechanism.

Further preferably, the second developing link is arranged on the pulling wire and at both ends of the thrombus capturing mechanism.

Further preferably, the third developing link is arranged on the pulling wire and at the distal end of the debris intercepting mechanism.

When the blood vessel blocking mechanism, the thrombus capturing mechanism and the debris intercepting mechanism in the thrombus removal system according to the embodiment of the present invention are in the released state at the same time, they can show different appearance structures so as to exert their specific functions, and not only can completely remove the thrombus and thrombus fragments, and the operation is simple, accurate in positioning and quick in opening, which meets the needs of clinical use.

The beneficial effects of the present invention

1. In a thrombus removal system provided by the embodiment of the present invention, by disposing a retractable and expandable blood vessel blocking mechanism at the head end of the communication catheter, the blood vessel blocking mechanism can be closely attached to the blood vessel wall when the blood vessel blocking mechanism is in a released state. Combined with short-term occlusion of the blood vessel, it can prevent the blood flow in the blood vessel from impacting the thrombus;

2. In the thrombus removal system provided by the embodiment of the present invention, by disposing a retractable and expandable thrombus capturing mechanism on the traction guide wire, when the thrombus capturing mechanism is in a released state, the blood vessel wall can be fully removed. Support expansion, which is conducive to the capture of thrombus;

3. In the thrombus removal system provided by the embodiment of the present invention, by disposing a retractable and inflatable fragment interception mechanism at the distal end of the pulling guide wire, the thrombus fragments in the blood can be removed when the fragment interception mechanism is in a released state. Filter removal to prevent it from flowing to the distal location of the vessel;

4. In the thrombus removal system provided by the embodiment of the present invention, the thrombus can be completely removed and the thrombus can be completely removed by the joint action of the blood vessel blocking mechanism, the thrombus capturing mechanism and the fragment intercepting mechanism, and under the auxiliary positioning of the developing link. thrombus fragments;

5. In a thrombus removal system provided by the present invention, when the blood vessel blocking mechanism, the thrombus capturing mechanism and the debris intercepting mechanism are in the released state at the same time, they can present different appearance structures so as to exert their specific functions, and The operation is simple, the positioning is accurate and the opening is fast, which meets the needs of clinical use.

Description of drawings

FIG. 1 is a schematic structural diagram of a thrombus removal system during contraction according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a thrombus removal system during expansion according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a developing link of a thrombus removal system according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of the operation of a thrombus removal system before passing through a thrombus according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of the operation of a thrombus removal system after passing through a thrombus according to an embodiment of the present invention.

FIG. 6 is a working schematic diagram of the entire mechanism in a thrombus removal system according to an embodiment of the present invention when the whole mechanism is positioned.

FIG. 7 is a working schematic diagram of the whole mechanism of a thrombus removal system according to an embodiment of the present invention when the whole mechanism is expanded.

FIG. 8 is a working schematic diagram of a blood vessel blocking mechanism in a thrombus removal system according to an embodiment of the present invention when it is expanded.

FIG. 9 is a working schematic diagram of a thrombus removal system according to an embodiment of the present invention when capturing thrombus and filtering thrombus fragments.

FIG. 10 is a working schematic diagram of a blood vessel occlusion mechanism in a thrombus removal system according to an embodiment of the present invention when it is contracted.

FIG. 11 is a schematic diagram of the work of a thrombus removal system according to an embodiment of the present invention to remove thrombus and thrombus fragments to the outside of the body.

FIG. 12 is a schematic diagram of the state in which the blood flow returns to normal operation after the thrombus and the thrombus fragments are completely removed according to the embodiment of the present invention.

Detailed ways

The embodiment of the present invention provides a thrombus removal system, which includes a recovery catheter, a transmission catheter, a communication catheter, a traction guide wire, a blood vessel blocking mechanism, a thrombus capturing mechanism, a debris intercepting mechanism and a developing link. When the system works, Through the joint action of the blood vessel blocking mechanism, the thrombus capturing mechanism and the fragment intercepting mechanism, and with the assistance of the imaging link, the thrombus and thrombus fragments can be completely removed. Embodiments of the present invention also provide a method for using the thrombus removal system.

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention. It should also be noted that the following description uses the terms "proximal end" and "distal end", where "proximal end" refers to the end close to the operator and "distal end" refers to the end away from the operator.

Example 1

This example provides a thrombus removal system that includes:

recovery catheter 1;

The transmission conduit 2, the transmission conduit 2 is movably sleeved in the recovery conduit 1;

The communication conduit 3, the communication conduit 3 is movably sleeved in the transmission conduit 2;

Pulling guide wire 4, the pulling guide wire 4 is arranged on the central axis in the communication catheter 3, moves along the direction of the central axis relative to the communication catheter 3, and the pulling guide wire 4 has two ends: a pulling end and a pushing end;

The blood vessel blocking mechanism 5, the blood vessel blocking mechanism 5 is fixedly arranged on the head end of the communication conduit 3, and the blood vessel blocking mechanism 5 is a contractible and inflatable balloon structure;

The thrombus capturing mechanism 6, the thrombus capturing mechanism 6 is fixedly arranged on the traction guide wire 4, between the advancing end and the vessel blocking mechanism, and the thrombus capturing mechanism 6 is a retractable and expandable mesh structure;

A debris intercepting mechanism 7, the debris intercepting mechanism 7 is fixedly arranged at the distal end of the pulling guide wire 4, and the debris intercepting mechanism 7 is a retractable and expandable basket structure; and

The developing link 8 is fixedly wound around the communicating conduit 3 and the pulling guide wire 4 .

In the above-mentioned thrombus removal system, the recovery catheter 1, the transmission catheter 2, the communication catheter 3, the traction guide wire 4, the blood vessel blocking mechanism 5, the thrombus capturing mechanism 6, the debris intercepting mechanism 7 and the developing link 8 are preferably arranged coaxially. . In the non-working state, the above mechanisms are all retracted in the recovery catheter 1 , as shown in FIG. 1 .

In the working state, as shown in FIG. 2 , the blood vessel blocking mechanism 5 is a balloon structure, which is spherical when inflated. When the blood vessel blocking mechanism 5 is released into the blood vessel, it can be closely attached to the blood vessel wall and the blood vessel can be closed for a short period of time. Blocking can prevent the blood flow in the blood vessel from impacting the thrombus, thereby facilitating the thrombus capturing mechanism 6 to capture the thrombus.

The thrombus capturing mechanism 6 has a mesh structure, and is in the shape of a round fusiform when expanded. When the blood vessel capturing mechanism 6 is released into the blood vessel, it can fully support and expand the blood vessel wall, which is beneficial to capturing the thrombus.

The debris intercepting mechanism 7 has a basket structure and is in the shape of a circular pocket when inflated. When the debris intercepting mechanism 7 is released into the blood vessel, the thrombus debris in the blood can be filtered and removed to prevent it from flowing to the distal end of the blood vessel.

The balloon structure of the vascular occlusion mechanism 5 is a polymer layer, and the polymer layer includes a polyvinyl chloride layer, a polyurethane layer, a nylon layer, a PET layer, a PEBAX layer, and the like. The balloon structure is in the shape of a tube when it is contracted, and it is spherical when the balloon structure is expanded.

When the balloon structure is released into the blood vessel, it is inflated by injecting a liquid such as physiological saline into it and tightly adheres to the blood vessel wall.

The mesh structure of the thrombus capturing mechanism 6 is a wire mesh, and the wire mesh includes a stainless steel mesh, a nickel-titanium alloy mesh, a cobalt-chromium alloy mesh, a tantalum alloy mesh, and a titanium alloy mesh. When the mesh structure shrinks, it is in the shape of a network tube, and when the mesh structure expands, it is in the shape of a round shuttle.

When the mesh structure is released into the blood vessel, the mesh area of the proximal part is larger, and the mesh area of the distal part is smaller, so as to have a better embedding and fixation effect when capturing the thrombus.

The basket structure of the debris intercepting mechanism 7 is a wire basket, and the wire basket includes a stainless steel basket, a nickel-titanium alloy basket, a cobalt-chromium alloy basket, a tantalum alloy basket, a titanium alloy basket, and the like. The basket structure is in the shape of a network tube when it is in a contracted state, and it is in the shape of a round pocket when the basket structure is in an expanded state.

The surface of the basket structure is covered with a polymer film, and the polymer film includes a polyurethane film, a polycarbonate film, a polypropylene film, a polytetrafluoroethylene film, a nylon film, and the like.

Circular holes with diameters of 80-160 μm are uniformly distributed on the polymer film.

As shown in FIG. 3 , part of the developing link 8 is fixedly wound on the pulling wire 4 , and the developing link 8 includes a first developing link, a second developing link and a third developing link. The material of the developing link 8 includes gold or its alloy, platinum or its alloy, tungsten or its alloy, and tantalum or its alloy.

As shown in FIG. 2 , the first imaging segment is arranged on the communication catheter 3 and at the proximal end of the vessel blocking mechanism 5 . The second developing link is arranged on the pulling guide wire 4 and both ends of the thrombus capturing mechanism 6 . The third developing link is arranged on the pulling wire 4 and at the distal end of the debris intercepting mechanism 7 .

The functions of the developing link 8 mainly include the following three points: (1) The developing link 8 can precisely locate the blood vessel blocking mechanism 5, the thrombus capturing mechanism 6 and the debris intercepting mechanism 7 in the thrombus removal system. The setting enables the operator to clearly observe the positions of the blood vessel blocking mechanism 5, the thrombus capturing mechanism 6 and the debris intercepting mechanism 7 in the blood vessel under the X-ray, and enables the operator to accurately and thoroughly complete the treatment of thrombus and thrombus. Debris removal work; (2) using the developing link 8 to be wound on the communication catheter 3, not only can significantly increase the overall pushing and pulling ability of the communication catheter 3, but also can improve the connection between the blood vessel blocking mechanism 5 and the communication catheter 3 (3) The development link 8 is used to wrap around the traction guide wire 4, which can not only significantly increase the overall pushing and pulling ability of the traction guide wire 4, but also The connection strength of the thrombus capturing mechanism 6, the fragment intercepting mechanism 7 and the traction guide wire 4 can be improved, and the safety of the thrombus removal system can be more effectively enhanced.

Example 2

This example provides a method of using a thrombus removal system, specifically:

The recovery catheter 1 including the delivery catheter 2, the communication catheter 3 and the pulling wire 4 is sent along the blood vessel 9 to the vicinity of the thrombus 10 through the control device, as shown in FIG. 4 .

The retrieval catheter 1 is locked by the control device, and the delivery catheter 2 containing the communication catheter 3 and the pulling wire 4 is advanced and passed through the thrombus 10, as shown in FIG. 5 .

The traction guide wire 4 is locked by the control device, and under the auxiliary positioning of the developing link 8, the communication catheter 3 is withdrawn to an appropriate distance, so that the blood vessel blocking mechanism 5 provided on the communication catheter 3 and the The thrombus capturing mechanism 6 can be precisely positioned at both ends of the thrombus 10 , as shown in FIG. 6 .

The communication catheter 3 and the pulling wire 4 are locked by the control device, and the transmission catheter 2 is withdrawn to the outlet of the recovery catheter 1, so that the blood vessel blocking mechanism 5 arranged at the head end of the communication catheter 3 and the thrombus arranged on the pulling wire 4 The capturing mechanism 6 and the debris intercepting mechanism 7 provided at the distal end of the pulling wire 4 are sequentially released into the blood vessel 9, as shown in FIG. 7 .

The communication catheter 3 and the pulling wire 4 are locked by the control device, and liquid such as normal saline is injected into the blood vessel blocking mechanism 5 at the head end of the communication catheter 3, so that it is inflated and closely attached to the blood vessel wall and the blood vessel 9 is temporarily blocked. The blood flow in the blood vessel 9 is prevented from impacting the thrombus 10, thereby facilitating the thrombus catching mechanism 6 to capture the thrombus 10, as shown in FIG. 8 .

The retraction catheter 1, the transmission catheter 2 and the communication catheter 3 are locked by the control device, and the pulling wire 4 is slowly withdrawn. During the withdrawal, the thrombus 10 is captured by the thrombus catching mechanism 6 provided on the pulling wire 4. And pushing toward the proximal direction, the mesh area of the proximal part of the thrombus capturing mechanism 6 is larger, and the mesh area of the distal part is smaller, so that the thrombus 10 can be better embedded and fixed when it is captured. At the same time, the debris intercepting mechanism 7 disposed at the distal end of the pulling wire 4 filters and removes the thrombus debris 11 to prevent it from flowing to the distal end of the blood vessel 9 , as shown in FIG. 9 .

The recovery catheter 1 and the transmission catheter 2 are locked by the control device, and the liquid such as physiological saline in the vascular blocking mechanism 5 at the head end of the communication catheter 3 is drawn out to make it contract, and at the same time, the retraction guide wire 4 is continued to be withdrawn, so that the guide wire 4 provided in the retraction guide wire 4 is withdrawn. The thrombus capturing mechanism 6 and the fragment intercepting mechanism 7 arranged at the distal end of the pulling guide wire 4 continue to push in the proximal direction. At this time, the thrombus 10 has been completely embedded and captured by the thrombus capturing mechanism 6, and the thrombus fragments 11 are also The intercepting mechanism 7 is filtered and removed, as shown in FIG. 10 .

The recovery catheter 1 is locked by the control device, and the transmission catheter 2, the communication catheter 3, the vessel blocking mechanism 5, the thrombus capturing mechanism 6 and the captured thrombus 10, the debris intercepting mechanism 7 and the filtered thrombus fragments 11 are withdrawn in sequence to recovery Inside the catheter 1, as shown in Figure 11.

The thrombus removal system is stably withdrawn from the body through the control device, and the removal of thrombus 10 and thrombus fragments 11 is completely completed, so that the blood flow in the blood vessel 9 returns to a normal operating state, as shown in FIG. 12 .

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention.

Claims (10)

1. A thrombus removal system, comprising: Recovery catheter (1); a transmission conduit (2), the transmission conduit (2) is movably sleeved in the recovery conduit (1); a communication conduit (3), the communication conduit (3) is movably sleeved in the transmission conduit (2); A pulling guide wire (4), the pulling guide wire (4) is arranged on the central axis in the communication conduit (3), and moves in the direction of the central axis relative to the communication conduit (3), the pulling guiding wire (4) It has two ends, a traction end and a propelling end; A blood vessel blocking mechanism (5), the blood vessel blocking mechanism (5) is fixedly arranged at the head end of the communication conduit (3), and the blood vessel blocking mechanism (5) is a contractible and inflatable balloon structure ; A thrombus capturing mechanism (6), the thrombus capturing mechanism (6) is fixedly arranged on the traction guide wire, between the advancing end and the blood vessel blocking mechanism (5), the thrombus capturing mechanism (6) It is a retractable and expandable mesh structure; A debris intercepting mechanism (7), the debris intercepting mechanism (7) is fixedly disposed at the distal end of the pulling wire (4), and the debris intercepting mechanism is a retractable and expandable basket structure; and A developing link (8), the developing link (8) is fixedly wound on the communicating conduit (3) and the pulling wire (4). 2 . The thrombus removal system according to claim 1 , wherein the balloon structure is in the shape of a tube when it is contracted, and in a spherical shape when it is expanded. 3 . 3. The thrombus removal system according to claim 1, wherein the capsule structure is a polymer layer, and the polymer layer comprises a polyvinyl chloride layer, a polyurethane layer, a nylon layer, a PET layer and a PEBAX layer etc. 4 . The thrombus removal system according to claim 1 , wherein the mesh structure is in the shape of a network tube when it is contracted, and is in the shape of a round fusiform when it is expanded. 5 . The thrombus removal system according to claim 1, wherein the mesh structure is a wire mesh, and the wire mesh comprises a stainless steel mesh, a nickel-titanium alloy mesh, a cobalt-chromium alloy mesh, and a tantalum alloy mesh. Mesh and titanium alloy mesh, etc. 6 . The thrombus removal system according to claim 1 , wherein the basket body structure is in the shape of a network tube when it is contracted, and is in the shape of a circular pocket when it is expanded. 7 . 7 . The thrombus removal system according to claim 1 , wherein the basket body structure is a wire basket, and the wire basket comprises a stainless steel basket, a nickel-titanium alloy basket, a cobalt-chromium alloy basket, and a tantalum alloy. 8 . Baskets and Titanium Baskets. 8 . The thrombus removal system according to claim 7 , wherein the surface of the wire basket is covered with a polymer film. 9 . 9 . The thrombus removal system according to claim 8 , wherein circular holes with a diameter of 80-160 μm are uniformly distributed on the polymer film. 10 . 10. The thrombus removal system according to claim 1, characterized in that, the developing link (8) comprises a first developing link, a second developing link and a third developing link.

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