A multi-stage variable diameter thrombectomy micro-stent

Abstract

The present invention discloses a multi-stage variable diameter thrombus removal micro-stent, comprising a handle and a thrombus removal stent, wherein the handle is located at one end of the thrombus removal stent, a delivery tube is provided between one end of the thrombus removal stent and the handle, a traction wire is provided in the middle of the delivery tube and is inserted into the interior of the handle, the thrombus removal stent comprises a guide head and a grid frame, a sliding groove is provided in the middle of the upper end of the handle, a push knob is provided in the middle of the upper end of the handle and is connected to the traction wire, a placement groove is provided in the middle of the push knob, an elastic telescopic rod is provided inside the placement groove, a button is provided at the upper end of the elastic telescopic rod, an extension block is provided at one end of the button, a rotating shaft connected to the push knob is provided in the middle of the extension block, and a limit block is provided at one end of the extension block. Beneficial effects: better and faster capture of thrombus, the cooperation of the push knob and the button improves the operability of the thrombus removal stent, more safely removes thrombus during the retrieval process, and increases practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a multi-stage variable-diameter thrombus removal micro-stent. Background Art

[0002] Approximately 17.55 million people in my country suffer from stroke. In 2018, the mortality rate from cerebrovascular disease was 149.49 per 100,000 people, resulting in 1.57 million deaths. The 2020 China Cardiovascular Health and Disease Report states that the number of stroke cases is 13 million. During conventional thrombolysis, clots are easily dislodged from the thrombectomy device during retrieval, requiring repeated capture. This increases patient pain, prolongs surgical procedures, and increases the risk of distal vascular occlusion. Therefore, currently, in addition to conventional thrombolysis, there are no suitable micro-thrombectomy stents for mechanical thrombectomy of small cerebral arterial emboli, leaving treatment options very limited.

[0003] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0004] In response to the problems in the related art, the present invention proposes a multi-stage variable diameter thrombus removal micro-stent to overcome the above-mentioned technical problems existing in the existing related art.

[0005] To this end, the specific technical solutions adopted in the present invention are as follows:

[0006] The thrombus removal stent of claim 1, wherein the handle is located at one end of the thrombus removal stent, a delivery tube is provided between one end of the thrombus removal stent and the handle, a traction wire is provided in the middle of the delivery tube and is inserted into the interior of the handle, the thrombus removal stent comprises a guide head and a grid frame, one end of the traction wire is inserted into the middle of the grid frame and is connected to the guide head, a blocking umbrella is provided at the front end of the guide head, a sliding groove is provided in the middle of the upper end of the handle, a push knob is provided in the middle of the upper end of the handle and is connected to the traction wire, a placement groove is provided in the middle of the push knob, an elastic telescopic rod is provided inside the placement groove, the upper end of the elastic telescopic rod is provided with a button, an extension block is provided at one end of the button, a rotating shaft connected to the push knob is provided in the middle of the extension block, and a limiting block is provided at one end of the extension block.

[0007] Furthermore, an anti-slip groove is provided at one end of the handle, the middle portion of the handle is an arc-shaped structure, and anti-slip grooves are provided at both ends of the handle located at the arc-shaped structure.

[0008] Furthermore, an anti-slip retractable belt is provided at the lower end of the handle, and a contraction adjustment piece is provided at the middle of the anti-slip retractable belt.

[0009] Furthermore, mounting holes are provided on both sides of the lower end of the handle, and buckles connected to the mounting holes are provided on both ends of the anti-dropping retractable belt.

[0010] Furthermore, scales are provided on both sides of the handle, and a plurality of scale numbers are provided on the scales.

[0011] Furthermore, a developing ring 1 and a developing ring 2 are respectively provided at both ends of the grid frame, the developing ring 1 is located between the guide head and the grid frame, and the developing ring 2 is located between the conveying pipe and the grid frame.

[0012] Furthermore, a slide plate is provided between the lower end of the button and the elastic telescopic rod, and the sliders on both ends of the slide plate are matched and connected with the push-twist inner wall sliding groove.

[0013] Furthermore, a rubber limiting pad is provided at the lower end of the limiting block, a plurality of oblique teeth are provided at the lower end of the rubber limiting pad, and an oblique groove matching the oblique teeth is provided at the middle part of the upper end of the handle.

[0014] The beneficial effects of the present invention are: by first inserting a catheter into the blood vessel, the thrombus is removed by the thrombus removal stent in the catheter, the thrombus removal stent can be extended and retracted by controlling the handle, the handle adjusts the size of the thrombus removal stent, and performs imaging tracking and special weaving technology; the thrombus is captured better and faster, and the cooperation of the push-twist and button improves the operability of the thrombus removal stent, and the thrombus is removed more safely during the retrieval process, which increases practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0016] Figure 1 This is a schematic structural diagram of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention;

[0017] Figure 2 3. This is a top view of a handle of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention;

[0018] Figure 3 2. It is a schematic diagram of a push-twist structure of a multi-stage variable-diameter thrombectomy micro-stent according to an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the delivery state of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention Figure 1 ;

[0020] Figure 5 Schematic diagram of the delivery state of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention Figure 2 ;

[0021] Figure 6 Schematic diagram of the delivery state of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention Figure 3 ;

[0022] Figure 7 Schematic diagram of the delivery state of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention Figure 4 ;

[0023] Figure 8 Schematic diagram of an occluding umbrella of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention;

[0024] Figure 9 Schematic diagram of an occluding umbrella of a multi-stage variable diameter thrombectomy micro-stent according to an embodiment of the present invention;

[0025] Figure 10 Schematic diagram of an occluding umbrella of a multi-stage variable-diameter thrombectomy micro-stent according to an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Handle; 2. Thrombectomy bracket; 3. Delivery tube; 4. Traction wire; 5. Guide head; 6. Grid frame; 7. Push-twist; 8. Placement slot; 9. Elastic telescopic rod; 10. Button; 11. Extension block; 12. Rotating shaft; 13. Limit block; 14. Anti-slip groove; 15. Anti-slip groove; 16. Anti-slip telescopic belt; 17. Contraction adjustment piece; 18. Scale; 19. Developing ring 1; 20. Developing ring 2; 21. Slide plate; 22. Rubber limiting pad; 23. Bevel teeth; 24. Bevel groove; 25. Sliding groove; 26. Propulsion catheter; 27. Sliding sleeve block; 28. Self-expanding bracket. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the present invention, a multi-stage diameter-variable thrombus removal micro-stent is provided.

[0030] Example 1:

[0031] like Figure 1-8 As shown, the multi-stage variable diameter thrombus removal micro-stent according to an embodiment of the present invention includes a handle 1 and a thrombus removal stent 2, the handle 1 is located at one end of the thrombus removal stent 2, a delivery tube 3 is provided between one end of the thrombus removal stent 2 and the handle 1, a traction wire 4 is provided in the middle of the delivery tube 3 and inserted into the interior of the handle 1, the thrombus removal stent 2 includes a guide head 5 and a mesh frame 6, one end of the traction wire 4 is inserted in the middle of the mesh frame 6 and connected to the guide head 5, and a blocking umbrella is provided at the front end of the guide head 5. A sliding groove 25 is provided in the middle of the upper end of the handle 1, and a push knob 7 connected to the traction wire 4 is provided in the middle of the upper end of the handle 1, a placement groove 8 is provided in the middle of the push knob 7, an elastic telescopic rod 9 is provided inside the placement groove 8, a button 10 is provided at the upper end of the elastic telescopic rod 9, an extension block 11 is provided at one end of the button 10, a rotating shaft 12 connected to the push knob 7 is provided in the middle of the extension block 11, and a limiting block 13 is provided at one end of the extension block 11.

[0032] Example 2:

[0033] like Figure 1-10 As shown, one end of the handle 1 is provided with an anti-slip groove 14. The middle portion of the handle 1 is an arc-shaped structure, and anti-slip grooves 15 are provided at both ends of the handle 1 located within the arc. The lower end of the handle 1 is provided with an anti-slip elastic band 16, and a contraction adjustment member 17 is provided in the middle of the anti-slip elastic band 16. Mounting holes are provided on both sides of the lower end of the handle 1, and buckles are provided at both ends of the anti-slip elastic band 16 to connect to the mounting holes. A scale 18 with a number of scale numbers is provided on both sides of the handle 1.

[0034] like Figure 1-10 As shown, the two ends of the mesh frame 6 are respectively provided with a developing ring 19 and a developing ring 20. The developing ring 19 is located between the guide head 5 and the mesh frame 6, and the developing ring 20 is located between the conveying tube 3 and the mesh frame 6. A slide 21 is provided between the lower end of the button 10 and the elastic telescopic rod 9. The sliders on both ends of the slide 21 are connected to the inner wall grooves of the push button 7. The lower end of the limit block 13 is provided with a rubber limit pad 22, and the lower end of the rubber limit pad 22 is provided with a plurality of bevel teeth 23. The middle part of the upper end of the handle 1 is provided with a bevel groove 24 that cooperates with the bevel teeth 23.

[0035] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in actual process is described in detail below.

[0036] In actual application, the mesh frame 6 has a minimum thrombus removal diameter of 0.5-2 mm, so that the mesh gap of the mesh frame 6 gradually decreases from the proximal end to the distal end. The mesh design with a good density ensures that the thrombus removal stent 2 can be quickly embedded in the blood vessel while increasing the ability of the thrombus removal stent 2 to bind to and capture the thrombus. The density of the mesh frame 6 on the thrombus removal stent 2 can effectively prevent small thrombi from falling off the stent and reduce damage to the blood vessel wall caused by the thrombus removal stent 2 when passing through the blood vessel. The provision of a soft guide head 5 increases the flexibility of the thrombus removal stent.

[0037] By adding a blocking umbrella in front of the guide head 5, the traction wire 4 can close the blocking umbrella. If it is expanded, it does not need to be expanded and it will automatically open. When closed, it is closed by the traction wire 4. The outside of the blocking umbrella is covered with an airbag. Specifically, the blocking umbrella includes a stent propulsion catheter 26, and the propulsion catheter 26 is provided with a matching sliding block 27. The sliding block 27 is surrounded by a number of evenly distributed self-expanding stents 28. The sliding sliding block 27 is pulled by the traction wire 4 to achieve the opening or contraction of the self-expanding stent. The self-expanding stent 28 is provided with a matching airbag. In the treatment of carotid artery stenosis, endothelial angioplasty stent implantation can form embolic protection through the self-expanding stent, which is simple and convenient to operate. The expansion of the airbag on the self-expanding stent provides complete and reliable blockage of the carotid artery, simplifying the catheter operation in the subsequent steps.

[0038] By cooperating with the push-twist 7 and the traction wire 4, the operability of the thrombus removal bracket 2 is improved, and the position between them can be accurately controlled under the scale 18. At the same time, when in use, the button 10 is moved downward as the push-twist 7 is used. The button 10 squeezes the elastic telescopic rod 9 through the slide 21, and the limit block 13 at one end moves upward under the action of the rotating shaft 12. When the push-twist 7 stops moving, the button 10 is loosened, so that the limit block 13 and the rubber limit pad 22 at the bottom end are connected to the inclined groove 24 under the action of the elastic telescopic rod 9, thereby achieving the limiting effect. The diameter of the thrombus removal bracket 2 is adjusted by the push-twist 7, and the button 10 locks the push-twist 7 and fixes the diameter of the thrombus removal bracket 2 to prevent errors and more safely remove the thrombus during the retrieval process.

[0039] To sum up, with the help of the above technical solution of the present invention, by first inserting a catheter into the blood vessel, the thrombus is removed by the thrombus removal stent 2 in the catheter. The thrombus removal stent 2 can be extended and retracted by the control of the handle 1. The handle 1 adjusts the size of the thrombus removal stent 2 and performs imaging tracking and special weaving technology; the thrombus is captured better and faster, and the cooperation of the push knob 7 and the button 10 improves the operability of the thrombus removal stent, and the thrombus is removed more safely during the retrieval process, which increases practicality.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage variable diameter thrombus removal micro-stent, characterized in that: The invention comprises a handle (1) and a thrombus removal bracket (2), wherein the handle (1) is located at one end of the thrombus removal bracket (2), a delivery tube (3) is provided between one end of the thrombus removal bracket (2) and the handle (1), a traction wire (4) inserted into the interior of the handle (1) is provided in the middle of the delivery tube (3), the thrombus removal bracket (2) comprises a guide head (5) and a grid frame (6), one end of the traction wire (4) is inserted into the middle of the grid frame (6) and connected to the guide head (5), a blocking umbrella is provided at the front end of the guide head (5), a sliding groove (25) is provided in the middle of the upper end of the handle (1), a push knob (7) matched with the traction wire (4) is provided in the middle of the upper end of the handle (1), a placement groove (8) is provided in the middle of the push knob (7), the inner portion of the placement groove (8) is provided with a push knob (7) connected with the traction wire (4), and a placement groove (8) is provided in the middle of the push knob (7). The handle (1) is provided with an elastic telescopic rod (9), the upper end of the elastic telescopic rod (9) is provided with a button (10), one end of the button (10) is provided with an extension block (11), the middle part of the extension block (11) is provided with a rotating shaft (12) connected to the push-twist (7), one end of the extension block (11) is provided with a limiting block (13), a slide plate (21) is provided between the lower end of the button (10) and the elastic telescopic rod (9), the sliders on both sides of the two ends of the slide plate (21) are connected with the inner wall groove of the push-twist (7), the lower end of the limiting block (13) is provided with a rubber limiting pad (22), the lower end of the rubber limiting pad (22) is provided with a plurality of oblique teeth (23), and the middle part of the upper end of the handle (1) is provided with an oblique groove (24) that matches the oblique teeth (23).

2. The multi-stage variable diameter thrombus removal micro-stent according to claim 1, characterized in that: One end of the handle (1) is provided with an anti-slip groove (14), the middle portion of the handle (1) is an arc-shaped structure, and both ends of the handle (1) located at the arc-shaped structure are provided with anti-slip grooves (15).

3. The multi-stage variable diameter thrombus removal micro-stent according to claim 1, characterized in that: The lower end of the handle (1) is provided with an anti-slipping telescopic belt (16), and the middle portion of the anti-slipping telescopic belt (16) is provided with a contraction regulating member (17).

4. The multi-stage variable diameter thrombus removal micro-stent according to claim 3, characterized in that: Both sides of the lower end of the handle (1) are provided with mounting holes, and both ends of the anti-dropping retractable belt (16) are provided with buckles connected to the mounting holes.

5. The multi-stage variable diameter thrombus removal micro-stent according to claim 1, characterized in that: Both sides of the handle (1) are provided with scales (18), and the scales (18) are provided with a plurality of scale numbers.

6. The multi-stage variable diameter thrombus removal micro-stent according to claim 1, characterized in that: A developing ring 1 (19) and a developing ring 2 (20) are respectively provided at both ends of the grid frame (6); the developing ring 1 (19) is located between the guide head (5) and the grid frame (6); and the developing ring 2 (20) is located between the conveying pipe (3) and the grid frame (6).

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