An intracranial thrombectomy protection device

Abstract

This utility model discloses an intracranial thrombectomy protection device, which includes a fixing component, a delivery component, and a thrombectomy component arranged sequentially. The delivery component includes a hypochlorous acid tube and a mandrel movably disposed within the hypochlorous acid tube. The thrombectomy component includes a braided body and a flared section. The braided body includes a proximal end near the delivery component and a distal end away from the delivery component. The end of the hypochlorous acid tube is fixedly connected to the proximal end of the braided body. The mandrel passes through the interior of the braided body and is fixedly connected to the distal end. When the thrombectomy component performs thrombectomy, the portion of the mandrel within the thrombectomy component is arc-shaped. After the thrombectomy component is completely withdrawn from the catheter, the braided body will extend and expand. Because the portion of the mandrel within the thrombectomy component is arc-shaped at this time, the braided body also has a certain angle of curvature, which can conform to the curved intracranial blood vessels as much as possible. Due to the presence of the flared section, it can conform to the vessel wall at the curved section.

Description

Technical Field

[0001] This utility model relates to the field of intracranial thrombectomy technology, specifically including an intracranial thrombectomy protection device. Background Technology

[0002] Minimally invasive interventional surgery is a common treatment for acute intracranial embolism. Currently, the main treatment techniques for emergency intracranial embolism removal include stent embolism removal, catheter aspiration, and stent combined with aspiration.

[0003] The methods described above are highly effective in removing large, obstructive thrombi. However, during thrombectomy, small plaques can still be impacted by blood flow and travel to distal vessels, leading to small vessel occlusion. Therefore, capturing escaped emboli is crucial for reducing intraoperative and postoperative complications during acute cerebral thrombectomy.

[0004] Current medical approaches involve adding a thrombectomy device to the thrombectomy apparatus. However, intracranial blood vessels, especially those in the siphon bend leading up to the middle cerebral artery, are quite tortuous. If the thrombectomy site cannot effectively adhere to the vessel wall, there is still a possibility of thrombus leakage. Furthermore, the middle cerebral artery lacks compensatory mechanisms, and occlusion of it can have severe consequences. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this utility model is to provide an intracranial thrombectomy protection device to address the technical problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an intracranial thrombectomy protection device, the intracranial thrombectomy protection device comprising a fixing component, a conveying component, and a thrombectomy component arranged sequentially; The delivery component includes a sodium hypochlorite tube and a core wire movably disposed in the sodium hypochlorite tube, and the fixing component is used to fix the sodium hypochlorite tube and the core wire; The thrombus catching component includes a braided body and a flared section. The braided body includes a proximal end near the delivery component and a distal end away from the delivery component. The end of the thrombus tube is fixedly connected to the proximal end of the braided body. The core wire passes through the inside of the braided body and is fixedly connected to the distal end. When the thrombus catching component catches the thrombus, the portion of the core wire located inside the thrombus catching component is arc-shaped.

[0007] Furthermore, the woven body is woven from 12 to 72 elastic filaments.

[0008] Furthermore, the woven body is a mesh cone shape.

[0009] Furthermore, the boundary line of the braided body on the side away from the core yarn is arc-shaped, and the tangential angle of the arc-shaped boundary line is α, where α is 0 degrees to 90 degrees.

[0010] Furthermore, the proximal and distal ends are fully enclosed structures, with the flared portion located at the proximal end.

[0011] Furthermore, the flared portion is made of an X-ray-proof spring, and its axial viewing angle is Z-shaped.

[0012] Furthermore, the woven body is made of ultra-elastic filaments with shape memory capabilities, such as nickel-titanium, cobalt-chromium, or platinum core.

[0013] Furthermore, the outer diameter of the catcher is between 1.5 mm and 7.0 mm, and the length is between 10 mm and 70 mm.

[0014] Furthermore, the throttle-catching part and the conveying part are connected together by welding or bonding.

[0015] Furthermore, both the core wire and the hypo tube are made of stainless steel or nickel-titanium alloy.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the core wire and the thiopancreatography tube of the delivery component are fixed using a fixing component; then the system is delivered to the distal end of the ischemic lesion; after the thrombectomy component is completely pushed out of the catheter, the braided body will extend and expand. Since the part of the core wire located in the thrombectomy section is arc-shaped, the braided body also has a certain angle of curvature, which can conform to the curved intracranial blood vessels as much as possible. Because of the presence of the flared section, it can fit the blood vessel wall in the curved section, which is convenient to adapt to the curvature of the blood vessel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bolt-catching component of this utility model; Figure 3 This is a schematic diagram of the flared part structure of this utility model; Figure 4 This is a schematic diagram of the overall structure of this utility model. Figure 5 This is a schematic diagram of the overall structure of this utility model, showing the operation of drawing out the core wire.

[0018] In the diagram: 101, throttle assembly; 11, braided body; 12, flared end; 31, fixing assembly; 304, conveying assembly; 17, core wire; 22, hyaluronic acid tube. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Current medical approaches involve adding a thrombectomy device to the thrombectomy apparatus. However, intracranial blood vessels, especially those in the siphon bend leading up to the middle cerebral artery, are quite tortuous. If the thrombectomy site cannot effectively adhere to the vessel wall, there is still a possibility of thrombus leakage. Furthermore, the middle cerebral artery lacks compensatory mechanisms, and occlusion of it can have severe consequences.

[0021] To address the above technical issues, please refer to [link / reference needed]. Figure 1 This embodiment provides an intracranial thrombectomy protection device, including a fixing component 31, a delivery component 304 and a thrombectomy component 101 arranged in sequence; The conveying component 304 includes a hyaluronic acid tube 22 and a core wire 17 movably disposed in the hyaluronic acid tube 22. The fixing component 31 is used to fix the hyaluronic acid tube 22 and the core wire 17. The hyaluronic acid tube 22 may be helically cut.

[0022] The thrombus catching component 101 includes a braided body 11 and a flared portion 12. The braided body 11 includes a proximal end near the delivery component 304 and a distal end away from the delivery component 304. The end of the sodium hypotube 22 is fixedly connected to the proximal end of the braided body 11. The core wire 17 passes through the inside of the braided body 11 and is fixedly connected to the distal end. When the thrombus catching component 101 catches the thrombus, the portion of the core wire 17 located inside the thrombus catching component 101 is arc-shaped.

[0023] like Figure 1 and Figure 4 As shown, firstly, the core wire 17 and the hypotube 22 of the delivery component 304 are fixed using the fixing component 31; then the system is delivered to the distal end of the ischemic lesion; after the thrombectomy component 101 is completely pushed out of the catheter, the braided body 11 will extend and expand. Since the part of the core wire 17 inside the thrombectomy component 101 is arc-shaped, the braided body 11 also has a certain angle of curvature, which can conform to the curved intracranial blood vessels as much as possible. Because of the presence of the flare 12, it can fit against the vessel wall at the curved section; on this basis, the fixing component 31 can be released, and tension is accumulated by fixing the hypotube 22 and pulling back the core wire 17 to make the flare 12 of the thrombectomy component 101 as stable as possible against the wall. At this time, the fixing component 31 is assembled and fixed to the delivery component 304; then the thrombus is aspirated through the aspiration catheter. At this time, small thrombi will be captured by the thrombectomy component 101 during their escape to the distal end. If there are still plaques stuck in the blood vessel, such as Figure 5 The plaque can be further recovered and removed from the body by retracting the catcher component 101 with the help of the net basket of the catcher component 101.

[0024] Please see Figure 1 and Figure 2 The braided body 11 is a mesh-like cone shape. The boundary line of the braided body 11 on the side away from the core wire 17 is arc-shaped, and the tangential angle of the arc-shaped boundary line is α, where α ranges from 0 to 90 degrees. By designing braided bodies 11 with different angles, the angles can be matched with those of tortuous blood vessels. This can maximize the wall-adhering effect of the flared portion 12 of the thrombectomy component 101 and prevent emboli from escaping during thrombectomy.

[0025] The main braid 11 is made of 12 to 72 elastic filaments. The high-density braiding can further effectively prevent the escape of the embolus.

[0026] The flared portion 12 is made of an X-ray-proof spring, and the axial angle of the spring is shaped like a "Z". Figure 3 As shown. Under the action of the spring, the opening of the flared part 12 is increased to a greater extent against the wall, thereby improving the bolt-catching effect of the bolt-catching component 101.

[0027] The proximal and distal ends are fully enclosed to reduce embolus escape. The flared portion 12 is located at the proximal end.

[0028] The main body 11 is woven from highly elastic filaments of nickel-titanium, cobalt-chromium, or platinum-core materials with shape memory capabilities. Metals with shape memory are highly malleable and can quickly rebound after being compressed within a blood vessel, maintaining their adherence to the vessel wall. If platinum-core filaments are used in the weaving, the relationship between the number of nickel-titanium or cobalt-chromium filament ends (x) and the number of non-transparent filament ends (y) in the main body is X / Y = 0~3, and both are evenly distributed in the circumferential direction. The outer diameter of the catcher component 101 is between 1.5 mm and 7.0 mm, and the length is between 10 mm and 70 mm. The diameter of the braided body is between 0.001" and 0.01", which is 0.001 inches to 0.01 inches. The catcher component 101 and the conveying component 304 are connected together by welding or bonding.

[0029] Both the core wire 17 and the hypo tube 22 are made of stainless steel or nickel-titanium.

[0030] The manufacturing method of the throttle-catching component 101 is as follows: First, a tapered braided body 11 is obtained through integrated braiding. Then, it is shaped by heat treatment. At this time, the flared part 12 is inserted and further shaped into a specific structure with a certain angle by a mold. The braided body can adopt a 1-press-1, 2-press-2, or other braiding structures.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An intracranial thrombectomy protection device, characterized in that, said intracranial thrombectomy protection device comprises a fixing component (31), a delivery component (304) and a thrombus capturing component (101) arranged in sequence; said delivery component (304) comprises a hypotube (22) and a core wire (17) movably arranged on the hypotube (22), and said fixing component (31) is used for fixing the hypotube (22) and the core wire (17); said thrombus capturing component (101) comprises a woven main body (11) and a flared portion (12), said woven main body (11) comprises a proximal end close to the delivery component (304) and a distal end far away from the delivery component (304), an end of said hypotube (22) is fixedly connected to the proximal end of the woven main body (11), said core wire (17) passes through the interior of the woven main body (11) and is fixedly connected to the distal end, when the thrombus capturing component (101) captures thrombus, the portion of said core wire (17) located inside the thrombus capturing component (101) is arc-shaped.

2. The intracranial thrombectomy protection device according to claim 1, characterized in that, Said woven main body (11) is woven from 12 to 72 elastic wire materials.

3. The intracranial thrombectomy protection device according to claim 2, characterized in that, Said woven main body (11) is in a mesh conical shape.

4. The intracranial thrombectomy protection device according to claim 3, characterized in that, A boundary line on a side of said woven main body (11) away from the core wire (17) is arc-shaped, a tangential angle of the arc-shaped boundary line is α, and α is 0 degree to 90 degrees.

5. The intracranial thrombectomy protection device according to claim 1, characterized in that, Said proximal end and said distal end are of fully enclosed structure, and said flared portion (12) is located at the proximal end.

6. The intracranial thrombectomy protection device according to claim 1, characterized in that, Said flared portion (12) is prepared from an X-ray opaque spring, and is in a Ji-shaped shape in axial view.

7. The intracranial thrombectomy protection device according to claim 1, characterized in that, Said woven main body (11) is woven from nitinol, cobalt-chromium or platinum-core-containing superelastic wire material with shape memory capability.

8. The intracranial thrombectomy protection device according to claim 1, characterized in that, The outer diameter of the thrombus capturing component is 1.5 mm to 7.0 mm, the length thereof is 10 mm to 70 mm, and the wire diameter of the woven main body ranges from 0.001" to 0.01".

9. The intracranial thrombectomy protection device according to claim 1, characterized in that, The thrombus capturing component and the delivery component are connected together by welding or bonding.

10. The intracranial thrombectomy protection device according to claim 1, characterized in that, Both said core wire (17) and said hypotube (22) are made of stainless steel or nitinol material.

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