Thrombolytic thrombectomy device

Abstract

The present invention provides a thrombolytic and thrombus removal device, which relates to the technical field of medical instruments and comprises a liquid spraying tube, a core tube, an elastic frame and a thrombus collecting structure, wherein the liquid spraying tube comprises a liquid spraying cavity and a core tube cavity, the distal end of the liquid spraying cavity is sealed, the proximal end of the liquid spraying cavity is used to connect with a liquid medicine injection device, and a liquid spraying hole is arranged on the side wall of the liquid spraying cavity; the core tube is slidably arranged in the core tube cavity along the axial direction; one end of the elastic frame is fixedly connected to the core tube, and the other end of the elastic frame is movably arranged, when the core tube moves along the axial direction, the elastic frame can be received in the core tube cavity or detached from the core tube cavity and unfolded; the thrombus collecting structure is arranged on the elastic frame, after the elastic frame is opened, the thrombus collecting structure is in a bowl shape, the bowl-shaped opening faces the proximal end of the elastic frame, and the thrombus collecting structure is provided with a filter hole; the present invention can not only conveniently perform thrombolysis, but also collect and take out the thrombus that is not fully dissolved out of the body, so as to avoid the occurrence of embolism.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thrombolytic and thrombectomy device. Background Art

[0002] Vascular embolism is a common symptom among vascular diseases, with extremely high disability and mortality rates. At present, the main treatments for this type of disease include mechanical thrombectomy, drug thrombolysis, catheter removal, etc. Catheter-contact thrombus removal is a common method for treating intravascular thrombosis. Its mechanism is to directly infuse high-concentration thrombolytic drugs around the thrombus through a catheter, thereby dissolving and removing the thrombus to achieve the purpose of treatment.

[0003] Existing thrombus removal catheters are usually kit-type, including a catheter body and a closed guidewire that plays a sealing role. During treatment, the independent guide wire is first inserted into the vein to the location of the embolic lesion through the skin, and then the thrombus removal catheter body is introduced into the vascular embolism site through the guide wire, and then the guide wire is withdrawn, and then the closed guidewire is inserted through the catheter to the matching point, and then the catheter body and the closed guidewire are connected to the drug delivery device, and the inner core is used to block the end of the catheter body near the patient to prevent the drug solution from overflowing from the end of the catheter, and to ensure that the drug solution is only released through the perfusion holes set on the side wall of the catheter, so as to achieve the purpose of uniform fixed-point drug delivery.

[0004] However, the sealing process of the end of the catheter body has very strict requirements on the size of the guidewire plug and the inner diameter of the catheter closure. If the gap between the guidewire plug and the end of the catheter body is matched and the gap is large, the front end of the catheter body will leak. If there is an interference fit, the guidewire plug will be stuck when it is pulled out. There is even a risk of deformation or breaking of the catheter, resulting in surgical failure or the need for further surgery. Therefore, it is usually necessary to control the gap between the two to less than 0.005mm to achieve a nearly complete closure effect, but this kind of matching accuracy has high processing and operation requirements, which is not conducive to the development of thrombus removal treatment.

[0005] Moreover, after using drugs to dissolve blood clots, large-grained blood clots may move with the blood to other locations in the blood vessels and cause embolism, affecting the patient's health.

[0006] Therefore, it is necessary to design a new type of structure to solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a thrombolytic and thrombus removal device to solve the problems existing in the above-mentioned prior art. It can not only conveniently perform thrombolysis, but also collect and remove the insufficiently dissolved thrombus from the body to avoid embolism.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] A thrombolytic and thrombus removal device comprises a liquid spraying tube, a core tube, an elastic frame and a thrombus collecting structure, wherein the liquid spraying tube comprises a liquid spraying cavity and a core tube cavity, the distal end of the liquid spraying cavity is sealed, the proximal end of the liquid spraying cavity is used to connect to a liquid medicine injection device, and a liquid spraying hole is arranged on the side wall of the liquid spraying cavity; the core tube cavity is open at both ends; the core tube is slidably arranged in the core tube cavity along the axial direction, and the core tube is used to pass a guide wire; one end of the elastic frame is fixedly connected to the core tube, and the other end of the elastic frame is movably arranged, when the core tube moves along the axial direction, the elastic frame can be received in the core tube cavity or detached from the core tube cavity and unfolded; the thrombus collecting structure is arranged on the elastic frame, after the elastic frame is opened, the thrombus collecting structure is bowl-shaped, the bowl-shaped opening faces the proximal end of the elastic frame, and the thrombus collecting structure is provided with a filter hole that can penetrate blood and intercept thrombus.

[0010] As one embodiment, the thrombus collection structure is a filter membrane or a filter mesh.

[0011] As one embodiment, the elastic skeleton includes a plurality of support rods distributed along the circumferential direction, and the support rods include a first support rod split and a second support rod split connected in a bent shape, the proximal end of the first support rod split is fixedly connected to the core tube, and the distal end of the second support rod split is axially slidably connected to the core tube; the filter membrane is arranged on the second support rod split.

[0012] As an embodiment, it also includes a sliding ring slidably sleeved on the core tube, and the sliding ring is fixedly connected to the distal end of the second support rod split body; the sliding ring is provided with a first developing ring.

[0013] As an embodiment, the radial cross-section of the liquid spraying chamber is annular, and a plurality of liquid spraying holes are evenly arranged along the axial direction and the circumferential direction of the annular shape.

[0014] As one embodiment, the core tube cavity includes a distal segment cavity and a proximal segment cavity, the inner diameter of the distal segment cavity is larger than the inner diameter of the proximal segment cavity, and the distal segment cavity is used to accommodate the elastic skeleton; the proximal segment cavity is located on the inner side of the spray cavity.

[0015] As one embodiment, a second developing ring, a third developing ring and a fourth developing ring are also provided on the spray pipe, the second developing ring is located at the distal end of the distal section cavity, the third developing ring is located at the distal end of the spray cavity, and the fourth developing ring is located at the proximal end of the spray cavity.

[0016] As one embodiment, it also includes a catheter seat, the distal end of which is fixedly connected to the proximal end of the spray tube, and the catheter seat is provided with an injection port and a core tube insertion port, the injection port is used to connect to a liquid medicine injection device, the injection port is communicated with the spray cavity, the core tube insertion port is used to insert the core tube, and the core tube insertion port is communicated with the core tube cavity.

[0017] As one embodiment, a liquid-blocking channel is provided in the catheter seat, and the liquid-blocking channel is located between the core tube cavity and the core tube socket. A liquid-blocking valve is provided in the liquid-blocking channel and is sleeved on the outside of the core tube. A tube-passing channel for passing through the core tube is provided in the liquid-blocking valve, and the distal opening of the tube-passing channel is interference fit with the core tube.

[0018] As an embodiment, it further comprises a handle, wherein the handle is fixedly connected to the proximal end of the core tube, and the handle is connected to one end of the catheter seat where the core tube socket is arranged through a Luer structure.

[0019] As an embodiment, the distal end of the core tube has a blocking portion for blocking the core tube lumen, and the blocking portion is in a conical shape with a diameter gradually increasing from proximal to distal.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] 1. The distal end of the liquid spraying cavity in the present invention is blocked. Before the liquid spraying thrombolysis, there is no need to set a blocking guide wire to block the liquid spraying cavity, and the thrombolysis operation is more convenient;

[0022] 2. In the present invention, the liquid spraying chamber and the core tube chamber are separately arranged, and the arrangement of the core tube does not affect the internal space of the liquid spraying chamber, and the movement of the core tube does not affect the normal liquid spraying process of the liquid spraying chamber, so that the thrombolysis process can proceed smoothly;

[0023] 3. The present invention arranges an elastic skeleton and a thrombus collection structure on the core tube, thereby being able to collect the thrombus that is not completely dissolved and remove it from the blood vessel to avoid embolism. The elastic skeleton can be retracted into the core tube cavity or extended from the core tube cavity during the movement of the core tube, which will not affect the process of placing the thrombolytic and thrombectomy device into the affected area and withdrawing it from the blood vessel, making the use process more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1It is a schematic diagram of the structure of the elastic skeleton in the thrombolytic and embolectomy catheter after it is unfolded in one embodiment of the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional view of

[0027] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0028] Figure 4 This is a schematic diagram of the structure of a thrombolytic and embolectomy catheter after the elastic skeleton is accommodated in the core tube cavity in one embodiment of the present invention;

[0029] Figure 5 for Figure 4 A cross-sectional view of

[0030] Figure 6 for Figure 5 A partial enlarged view of B in the middle;

[0031] Figure 7 A schematic diagram of the structure of an elastic skeleton in one embodiment of the present invention;

[0032] Figure 8 A schematic diagram of the structure of a catheter seat in one embodiment of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of a liquid blocking valve in one embodiment of the present invention;

[0034] Fig.10 It is a schematic structural diagram of a handle with a cylindrical clamping portion in one embodiment of the present invention;

[0035] Fig.11 It is a schematic structural diagram of a handle without a cylindrical clamping portion in one embodiment of the present invention;

[0036] Description of reference numerals:

[0037] 1. Spray tube; 2. Core tube; 3. Elastic skeleton; 4. Filter membrane; 5. Spray chamber; 6. Core tube chamber; 7. Spray hole; 8. First support rod split; 9. Second support rod split; 10. Fixed ring; 11. Sliding ring; 12. First developing ring; 13. Second developing ring; 14. Third developing ring; 15. Fourth developing ring; 16. Catheter seat; 17. Reinforcement tube; 18. Liquid injection port; 19. Core tube socket; 20. Liquid blocking channel; 21. Liquid blocking valve; 22. Handle; 23. Cylindrical clamping part; 24. Clamping block; 25. Blocking part. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0039] The purpose of the present invention is to provide a thrombolytic and thrombus removal device to solve the problems existing in the above-mentioned prior art. It can not only conveniently perform thrombolysis, but also collect and remove the insufficiently dissolved thrombus from the body to avoid embolism.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 to Figure 11 The present embodiment discloses a thrombolytic and thrombus removal device, comprising a liquid spray tube 1, a core tube 2, an elastic skeleton 3 and a thrombus collection structure. The liquid spray tube 1 comprises a liquid spray chamber 5 and a core tube chamber 6. The distal end of the liquid spray chamber 5 is sealed, and the proximal end of the liquid spray chamber 5 is used to connect to a liquid injection device. The distal end in the present embodiment refers to the end away from the operator (i.e., the staff performing the operation, hereinafter referred to as the operator), and the proximal end refers to the end close to the operator. A liquid spray hole 7 is provided on the side wall of the liquid spray chamber 5; the core tube chamber 6 is opened at both ends, respectively for the core tube 2 to pass in and out. The core tube 2 is slidably arranged in the core tube chamber 6 along the axial direction. One end of the elastic skeleton 3 is fixedly connected to the core tube 2, and the other end of the elastic skeleton 3 is movably arranged. When the core tube 2 moves axially, the elastic skeleton 3 can be received in the core tube cavity 6 or detached from the core tube cavity 6 and unfolded; the thrombus collection structure is arranged on the elastic skeleton 3. After the elastic skeleton 3 is opened, the thrombus collection structure is bowl-shaped, and the bowl-shaped opening faces the proximal end of the elastic skeleton 3. The thrombus collection structure is provided with filter holes that can pass blood and intercept thrombi.

[0042] When in use, the core tube 2 can be inserted into the already placed guide wire, and after the thrombolytic and thrombectomy device is sent to the thrombus position in the blood vessel through the guide wire, the proximal end of the spray chamber 5 is connected to the liquid injection device. The elastic skeleton 3 in the core tube 2 is located in the core tube cavity 6. The operator manipulates the core tube 2 to make the core tube 2 move forward axially (towards the direction away from the operator), and the elastic skeleton 3 is unfolded after being separated from the core tube cavity 6, and at the same time drives the thrombus collection structure to stretch into a bowl shape. The liquid injection device injects liquid medicine into the spray chamber 5, and the liquid medicine is sprayed from the spray hole 7 to dissolve the thrombus, and the thrombus that is not completely dissolved is collected by the thrombus collection structure. After the thrombus elimination operation is completed, the core tube 2 is manipulated to move backward, and the elastic skeleton 3 and the thrombus collection structure are retracted into the core tube cavity 6. Finally, the thrombolytic and thrombectomy device is taken out from the blood vessel, and the undissolved thrombus is taken out.

[0043] Due to the distal blocking of the spray chamber 5 in the present embodiment, there is no need to set a blocking guide wire to block the spray chamber 5 before spraying thrombolysis, and the thrombolysis operation is more convenient; the spray chamber 5 and the core tube chamber 6 are separately set, and the setting of the core tube 2 will not affect the occupation of the internal space of the spray chamber 5, and the movement of the core tube 2 will not affect the normal spraying process of the spray chamber 5, so that the thrombolysis process can proceed smoothly; and, by setting an elastic skeleton 3 and a thrombus collection structure on the core tube 2, the present embodiment can collect the thrombus that is not completely dissolved and remove it from the blood vessel to avoid embolism; and the elastic skeleton 3 can be retracted into the core tube chamber 6 or extended from the core tube chamber 6 during the movement of the core tube 2, which will not affect the process of placing the thrombolysis and thrombectomy device into the affected area and withdrawing it from the blood vessel, and the use process is more convenient.

[0044] The elastic skeleton 3 in this embodiment is made of memory metal, specifically nickel-titanium alloy, which can be deformed under the action of external force to facilitate storage in the core tube cavity 6; after the external force is removed, it can also return to its original shape to meet the use requirements. The thrombus collection structure is a filter membrane 4 or a filter screen. When the filter membrane 4 is used, the filter membrane 4 is made of TPU (polyurethane) material, which is a transparent film coated on the elastic skeleton 3 after the TPU solution is shaped and demolded. The filter holes on the filter membrane 4 are circular holes made by laser cutting technology, and the diameter of the holes is not more than 100 microns, which can intercept and filter out the thrombus in the blood. When a filter screen is used, the filter screen can also be made of nickel-titanium alloy or other materials, and the diameter of the filter holes on the filter screen is not more than 100 microns. The following is discussed with the thrombus collection structure as the filter membrane 4.

[0045] like Figure 7 As shown, the elastic skeleton 3 in this embodiment includes a plurality of support rods distributed along the circumferential direction, and the support rods include a first support rod split 8 and a second support rod split 9 connected in a bent shape, the proximal end of the first support rod split 8 is fixedly connected to the core tube 2 through a fixing ring 10, and the distal end of the second support rod split 9 is axially slidably connected to the core tube 2; the filter membrane 4 is arranged on the second support rod split 9. As an embodiment, it also includes a sliding ring 11 slidably sleeved on the core tube 2, and the sliding ring 11 is fixedly connected to the distal end of the second support rod split 9; a first developing ring 12 is arranged on the sliding ring 11. The first developing ring 12 is a metal ring made of platinum-iridium alloy, which is fixed in the form of forging, and its function is to be able to be developed under radiation irradiation, so that the operator can identify the distal position of the filter.

[0046] Those skilled in the art should understand that it is feasible that the proximal end of the first support rod body 8 is axially slidably connected to the core tube 2 via the sliding ring 11, and the distal end of the second support rod body 9 is fixedly connected to the core tube 2 via the fixing ring 10. It is only necessary to adjust the angle between the first support rod body 8 and the axis of the core tube 2 after the elastic skeleton 3 is unfolded.

[0047] As another embodiment of the support rod, the support rod may only include a first support rod split body 8; in this structural form, the distal end of the filter membrane 4 can be directly fixed on the core tube 2, and the proximal end of the filter membrane 4 is fixedly connected to the distal end of the first support rod split body 8. By utilizing the foldable nature of the filter membrane 4, it can also be received into the core tube cavity 6 along with the elastic skeleton 3.

[0048] As an implementation mode, the liquid spraying tube 1 in this embodiment has a double-layer tube structure, and the distal end of the gap between the double-layer tube structures is sealed. The internal cavity of the double-layer tube structure is a liquid spraying cavity 5, and the radial cross-sectional shape of the liquid spraying cavity 5 is annular. The liquid spraying holes 7 are arranged on the outer tube, and a plurality of liquid spraying holes 7 are evenly arranged in the axial direction and circumferential direction of the annular shape. The inner cavity of the inner tube in the double-layer tube structure is the core tube cavity 6.

[0049] As an embodiment, the liquid spray tube 1 also includes a single-layer tube structure, the proximal end of the single-layer tube structure is connected to the distal end of the double-layer tube structure. The core tube cavity 6 includes a distal section cavity inside the single-layer tube structure and a proximal section cavity inside the inner tube of the double-layer tube structure, the diameter of the distal section cavity is larger than the proximal section cavity, and the distal section cavity is used to accommodate the elastic skeleton 3.

[0050] As an embodiment, the liquid spraying pipe 1 is further provided with a second developing ring 13, a third developing ring 14 and a fourth developing ring 15. The second developing ring 13 is located at the distal end of the distal section cavity, and is used to identify the distal position of the liquid spraying pipe 1. The third developing ring 14 is located at the distal end of the liquid spraying cavity 5, and is used to identify the distal position of the distribution area of ​​the liquid spraying holes 7. The fourth developing ring 15 is located at the proximal end of the liquid spraying cavity 5, and is used to identify the proximal position of the distribution area of ​​the liquid spraying holes 7. The second developing ring 13, the third developing ring 14 and the fourth developing ring 15 are all metal rings made of platinum-iridium alloy, and are fixed in the form of forging.

[0051] like Figure 8 As shown, the thrombolytic thrombectomy device in this embodiment further includes a catheter seat 16, the distal end of the catheter seat 16 is fixedly connected to the proximal end of the liquid spraying tube 1, and the connection method can be bonding. In order to prevent the liquid spraying tube 1 from bending or brittle fracture at the connection position, the distal end of the catheter seat 16 in this embodiment is connected to a reinforcing tube 17, and the reinforcing tube 17 is a special-shaped catheter made of Pebax material (polyether block polyamide) injection molding. The proximal end of the reinforcing tube 17 is clamped with the catheter seat 16 in the form of a flange sleeve, and the inner diameter of the reinforcing tube 17 can be clearance-matched with the liquid spraying tube 1.

[0052] The catheter seat 16 is provided with a liquid injection port 18 and a core tube socket 19. The liquid injection port 18 is used to connect to the drug injection device and communicate with the liquid spray chamber 5. The core tube socket 19 is used to insert the core tube 2 and communicate with the core tube cavity 6. The catheter seat 16 is also provided with a liquid blocking channel 20. The liquid blocking channel 20 is located between the core tube cavity 6 and the core tube socket 19. A liquid blocking valve 21 is provided in the liquid blocking channel 20 and is sleeved on the outside of the core tube 2. A tube penetration channel for passing through the core tube 2 is provided in the liquid blocking valve 21. The distal opening of the tube penetration channel is interference fit with the core tube 2 to prevent blood from flowing back out of the liquid blocking channel 20 or the tube penetration channel. In this embodiment, the liquid blocking valve 21 is a soft polymer part made of polyurethane material injection molding, with a solid columnar structure at the proximal end and a tapered multi-layer structure at the distal end, such as Fig. 9 shown.

[0053] As an embodiment, the distal end of the core tube 2 has a blocking portion 25 for blocking the core tube lumen 6, and the blocking portion 25 is in a tapered shape with a diameter gradually increasing from near to far. The outer diameter of the distal end of the tapered shape is close to the inner diameter of the core tube lumen 6. After the two are matched, the blocking portion 25 blocks the distal end port of the core tube lumen 6, which prevents blood from flowing back from the core tube lumen 6 when the thrombolytic thrombectomy device is pushed.

[0054] The thrombolytic thrombectomy device in this embodiment also includes a handle 22, which is fixedly connected to the proximal end of the core tube 2, and the inner surface of the handle 22 is provided with a Luer-shaped thread, which is connected to one end of the catheter seat 16 where the core tube socket 19 is provided through a Luer structure. When the handle 22 is rotated forward, the connection section between the handle 22 and the catheter seat 16 gradually becomes longer, the elastic skeleton 3 on the core tube 2 is pushed out from the distal section cavity, and the elastic skeleton 3 and the filter membrane 4 are unfolded. When the handle 22 is reversed, the connection section between the handle 22 and the catheter seat 16 gradually becomes shorter, and the elastic skeleton 3 is retracted into the distal section cavity. In order to prevent the handle 22 from being reversed and disengaged from the Luer structure of the catheter seat 16, and the handle 22 from falling off the catheter seat 16, an annular flange is provided at one end of the catheter seat 16 where the core tube socket 19 is provided in this embodiment, and an annular protrusion that can be engaged with the annular flange is provided at the distal end of the handle 22, and the setting of the annular protrusion can prevent the handle 22 from being disengaged from the catheter seat 16. However, when an external force is applied, for example, the handle 22 can be disengaged by pulling it proximally, or the handle 22 can be pre-connected with the catheter seat 16 by pushing it distally (i.e., the annular flange and the annular protrusion are connected in a limited position). In order to facilitate the connection of the handle 22 with other devices, a Luer structure is provided at the distal end of the handle 22.

[0055] In this embodiment, a flexible cylindrical clamping portion 23 is disposed inside the handle 22. The cylindrical clamping portion 23 can be made of silicone, such as Fig.10As shown. The cylindrical clamping part 23 has an axial channel inside, and the channel is used to insert the core tube 2. After the handle 22 and the catheter seat 16 are screwed, the catheter seat 16 squeezes the cylindrical clamping part 23 to clamp and fix the core tube 2. At the same time, the distal end of the cylindrical clamping part 23 presses the proximal end of the liquid blocking valve 21. Alternatively, the handle 22 is not provided with a flexible cylindrical clamping part 23, and the proximal end of the core tube 2 can be bonded and fixed to the handle 22, as shown in FIG. Fig.11 and the proximal end of the liquid blocking valve 21 is fixed by a clamping block 24, and the clamping block 24 is engaged with the inner wall of the liquid blocking channel 20.

[0056] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0057] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A thrombolytic and thrombectomy device, characterized in that: include: A liquid spraying tube, the liquid spraying tube comprising a liquid spraying cavity and a core tube cavity, the distal end of the liquid spraying cavity is sealed, the proximal end of the liquid spraying cavity is used to connect with a liquid medicine injection device, and a liquid spraying hole is arranged on the side wall of the liquid spraying cavity; both ends of the core tube cavity are open; A core tube, the core tube is slidably arranged in the core tube cavity along the axial direction, and the core tube is used for passing a guide wire; An elastic skeleton, one end of which is fixedly connected to the core tube, and the other end of which is movably arranged, so that when the core tube moves axially, the elastic skeleton can be stored in the core tube cavity or detached from the core tube cavity to be unfolded; and a thrombus collection structure, wherein the thrombus collection structure is arranged on the elastic frame, and when the elastic frame is opened, the thrombus collection structure is in a bowl shape, the opening of the bowl shape faces the proximal end of the elastic frame, and the thrombus collection structure is provided with a filter hole capable of passing blood and intercepting thrombus; The thrombus collection structure is a filter membrane or a filter mesh; The elastic skeleton comprises a plurality of struts distributed along the circumferential direction, wherein the struts comprise a first strut split body and a second strut split body connected in a bent shape, wherein the proximal end of the first strut split body is fixedly connected to the core tube, and the distal end of the second strut split body is axially slidably connected to the core tube; The filter membrane is arranged on the second support rod body.

2. The thrombolytic and thrombectomy device according to claim 1, characterized in that: It also includes a sliding ring slidably sleeved on the core tube, the sliding ring is fixedly connected to the distal end of the second support rod split body; the sliding ring is provided with a first developing ring.

3. The thrombolytic and thrombectomy device according to claim 1, characterized in that: The radial cross-section of the liquid spraying cavity is annular, and a plurality of liquid spraying holes are evenly arranged in the axial and circumferential directions of the annular shape; the core tube cavity includes a distal segment cavity and a proximal segment cavity, the inner diameter of the distal segment cavity is larger than the inner diameter of the proximal segment cavity, and the distal segment cavity is used to accommodate the elastic skeleton; the proximal segment cavity is located on the inner side of the liquid spraying cavity.

4. The thrombolytic and thrombectomy device according to claim 3, characterized in that: The spray pipe is also provided with a second developing ring, a third developing ring and a fourth developing ring, the second developing ring is located at the distal end of the distal section cavity, the third developing ring is located at the distal end of the spray cavity, and the fourth developing ring is located at the proximal end of the spray cavity.

5. The thrombolytic and thrombectomy device according to claim 1, characterized in that: It also includes a catheter seat, the distal end of which is fixedly connected to the proximal end of the spray tube, and the catheter seat is provided with an injection port and a core tube insertion port, the injection port is used to connect to a liquid medicine injection device, the injection port is communicated with the spray cavity, the core tube insertion port is used to insert the core tube, and the core tube insertion port is communicated with the core tube cavity.

6. The thrombolytic and thrombectomy device according to claim 5, characterized in that: A liquid-blocking channel is provided in the catheter seat, and the liquid-blocking channel is located between the core tube cavity and the core tube insertion port. A liquid-blocking valve is provided in the liquid-blocking channel and is sleeved on the outside of the core tube. A tube-penetrating channel for passing through the core tube is provided in the liquid-blocking valve, and a distal opening of the tube-penetrating channel is interference fit with the core tube.

7. The thrombolytic and thrombectomy device according to claim 5, characterized in that: It also includes a handle, which is fixedly connected to the proximal end of the core tube, and the handle is connected to one end of the catheter seat where the core tube socket is arranged through a Luer structure.

8. The thrombolytic and thrombectomy device according to claim 1, characterized in that: The distal end of the core tube has a blocking portion for blocking the core tube cavity, and the blocking portion is in a conical shape with a diameter gradually increasing from proximal to distal.

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