Cerebral thrombosis resection device with protection function
By designing a cerebral thrombectomer with protective function, using cannula structure and resection mechanism, the problems of thrombosis fragment escape and difficulty in penetration in the prior art are solved, and more efficient thrombosis capture and more flexible surgical operations are achieved.
Patent Information
- Application Number
- CN202421878084.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-05
AI Technical Summary
Existing stent-type cerebral thrombectomy devices are prone to escape during the resection process, and are difficult to penetrate or cross the thrombus, resulting in inability to perform effective thrombectomy in some cases.
A cerebral thrombectomer with protective function was designed, adopting a cannula structure, with one end of the cannula equipped with a resection mechanism, including components such as front guidewire, fixing ring, braided mesh and auxiliary folding sheet, through which the precise fixation and capture of the thrombus is achieved.
Through this design, the resection can effectively fix and capture thrombus, reduce the escape of thrombus debris, improve the resection efficiency and success rate, and can flexibly control the expansion and contraction of the resection, adapt to thrombus of different sizes and shapes, and improve the flexibility and safety of the surgery.
Smart Images
Figure CN222942413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, in particular to a cerebral thrombectomy device with a protective function. Background Art
[0002] The cerebral thrombectomy device is a therapeutic device that can instantly remove or remove thrombus tissue in cerebral blood vessels and restore tissue blood flow. It has the effect of saving the life and important life functions of patients with cerebrovascular accidents;
[0003] At present, the main clinical method for treating acute cerebral thrombosis is to use a stent-type cerebral thrombectomy device. The main drawback is that the distal end of the stent is still a large space and is open, which can easily lead to the escape of thrombus and fragments from the distal end. In addition, since the device is a self-expanding working mode, the stent itself does not have the ability to penetrate thrombi and cannot enter or pass through thrombi. The thrombus treatment process can only be performed after the thrombus has been passed through a microcatheter. When some catheters or microcatheters are difficult to reach the target site, thrombus removal cannot be performed due to problems with the introduction and delivery of the stent-type cerebral thrombectomy device.
[0004] Therefore, if the distal end of the cerebral thrombectomy device can have a distal fragment capture function, the high escape rate of thrombus fragments in the current cerebral thrombectomy devices can be avoided. If the device has the ability to penetrate and pass through the thrombus, better regulation and operation performance can be achieved, making it easier for the operation to proceed smoothly. Utility Model Content
[0005] The purpose of the utility model is to provide a cerebral thrombectomy device with a protective function to solve the problems raised in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A cerebral thrombectomy device with a protective function comprises a sleeve, characterized in that a removal mechanism is arranged at one end of the sleeve, a front guide wire for penetrating the thrombus is arranged at the side of the removal mechanism opposite to the sleeve, and a control component for controlling the removal mechanism to switch on and off is arranged at the end of the sleeve opposite to the removal mechanism.
[0008] Furthermore, the resection mechanism includes: a fixing ring, which is fixedly connected to one side surface of the front end guide wire, a penetrating opening is provided at the center of the fixing ring for easy engagement with one side surface of the sleeve, and a woven net is fixedly connected to the side of the fixing ring opposite to the front end guide wire, and a plurality of basket bundles are arranged on one side of the woven net.
[0009] Furthermore, the cutting mechanism also includes: a connecting plate, which is located at the other end of the basket bundle away from the woven net, and the connecting plate is fixedly installed at the center of the sliding ring. The sliding ring is sleeved on one end surface of the sleeve and can slide on the surface of the sleeve. An auxiliary rod is also fixedly connected to one side surface of the sliding ring, and a limiting block is sleeved on the other end surface of the auxiliary rod, and an auxiliary folding piece is provided on the other side surface of the limiting block.
[0010] Furthermore, one side surface of the auxiliary folding sheet is fixedly connected to the side surface of the limiting block, and a pulling wire is fixedly installed on the other side surface. The pulling wire is located inside the sleeve and can slide inside the sleeve.
[0011] Furthermore, the cutting mechanism also includes: an inner tube, which is sleeved on the outer surface of the pulling wire and is also located inside the sleeve. A fixing plate is provided at one end of the inner tube, and the fixing plate is located inside the sleeve. The inner tube is in an immovable state inside the sleeve, and the inner tube penetrates the center of the auxiliary folding sheet and is fixedly connected to one end of the auxiliary rod.
[0012] Furthermore, the control component includes: a fixed joint, which is sleeved on one end surface of the sleeve, and a movable joint is provided on one side of the fixed joint, and one side surface of the movable joint is fixedly connected to the pulling wire.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. In this scheme, by providing a cutting mechanism, the auxiliary folding sheet is expanded by pulling the movable joint, and its edge becomes narrower and can be inserted into the thrombus, thereby achieving accurate fixation of the thrombus, enhancing the fixing effect of the cutter on the thrombus, and also helping to reduce the movement of the thrombus during the capture process, thereby improving the capture efficiency and success rate. At the same time, the expanded basket cluster and woven net can quickly form a stable space, effectively completely surround and fix the thrombus therein, and ensure the smooth progress of the subsequent stripping process;
[0015] 2. In this solution, a control component is provided. By operating the control component, the doctor can flexibly control the expansion and contraction of the resector to achieve precise control of the thrombus. This design enables the doctor to adjust the state of the resector according to actual conditions to adapt to thrombi of different sizes and shapes, thereby improving the flexibility and adaptability of the operation. After the thrombus stripping is completed, the resector can quickly return to its initial contracted state, allowing the entire device to be smoothly withdrawn from the blood vessel, avoiding unnecessary damage to the blood vessel wall during the withdrawal process, shortening the operation time, and improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the cutting mechanism structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of the casing of the utility model;
[0019] Figure 4 This is a schematic diagram of the sliding ring structure of the utility model.
[0020] In the figure: 1. casing; 2. sliding ring; 3. fixed joint; 4. pulling wire; 5. movable joint; 6. woven net; 7. net basket cluster; 8. fixed ring; 9. front guide wire; 10. auxiliary folding plate; 11. limiting block; 12. inner tube; 13. connecting plate; 14. fixing plate; 15. penetrating opening; 16. auxiliary rod. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] Example 1: Please refer to Figures 1 to 4 A cerebral thrombectomy device with a protective function comprises a cannula 1, a cutting mechanism is arranged at one end of the cannula 1, a front guide wire 9 for penetrating the thrombus is arranged at the side of the cutting mechanism opposite to the cannula 1, the front guide wire 9 is used to navigate the cutter to the location of the cerebral thrombus, and the front guide wire 9 penetrates and contacts the thrombus through precise operation, so as to accurately position the cutting mechanism, and a control component for controlling the cutting mechanism to switch is arranged at the end of the cannula 1 opposite to the cutting mechanism;
[0023] The cutting mechanism comprises: a fixing ring 8, the fixing ring 8 is fixedly connected to the surface of one side of the front end guide wire 9, a through hole 15 is provided at the center of the fixing ring 8 for easy engagement with the surface of one side of the sleeve 1, and the through hole 15 can be engaged with the insert on the side surface of the sleeve 1, so that the device surface is tighter when the device is not expanded, a braided net 6 is fixedly connected to the side of the fixing ring 8 opposite to the front end guide wire 9, the braided net 6 is made of a plurality of nickel-titanium wires with an outer diameter of fifty to eighty microns or platinum nickel-titanium wires woven and heat-treated for finalization, a plurality of basket clusters 7 are arranged on one side of the braided net 6, the other end of the basket cluster 7 is connected to a connecting plate 13, the connecting plate 13 is fixedly installed at the center of the sliding ring 2, the sliding ring 2 is sleeved on the surface of one end of the sleeve 1, and can slide on the surface of the sleeve 1, an auxiliary rod 16 is also fixedly connected to the surface of one side of the sliding ring 2, the other end surface of the auxiliary rod 16 is sleeved with a limiting block 11, the other side of the limiting block 11 The surface is provided with an auxiliary folding sheet 10, which can be folded with stretching to form two states of expansion and contraction. When the auxiliary folding sheet 10 is expanded, because the contraction edge width becomes narrower, the edge can be inserted into the inside of the thrombus to play an auxiliary fixing effect. One side surface of the auxiliary folding sheet 10 is fixedly connected to the side surface of the limiting block 11, and the other side surface is fixedly installed with a pulling wire 4, which is located inside the sleeve 1 and can slide inside the sleeve 1. The auxiliary folding sheet 10 can be folded and expanded by pulling the pulling wire 4, so as to assist the basket cluster 7 to expand. The outer surface of the pulling wire 4 is provided with an inner tube 12, and the inner tube 12 is also located inside the sleeve 1. A fixing plate 14 is provided at one end of the inner tube 12, and the fixing plate 14 is located inside the sleeve 1. The inner tube 12 is in an immovable state inside the sleeve 1, and the inner tube 12 penetrates the center of the auxiliary folding sheet 10 and is fixedly connected to one end of the auxiliary rod 16.
[0024] In the initial state, the resector is in an unexpanded state, the basket cluster 7 and the braided net 6 are in a compressed state, the auxiliary folding sheet 10 is also in a contracted state, the pulling wire 4 is located inside the sleeve 1 and is not subjected to external force. When performing thrombus removal, the front end guide wire 9 is first used to penetrate the thrombus, and then the movable joint 5 is pushed inward to move the pulling wire 4 forward, and the auxiliary folding sheet 10 is expanded by squeezing. The edge of the auxiliary folding sheet 10 becomes thinner and narrower due to the expansion, and can be inserted into the thrombus to play an auxiliary fixation role. The expansion of the auxiliary folding sheet 10 will also drive the basket cluster 7 to expand outward, so that the braided net 6 is expanded to form a space that can accommodate and capture the thrombus. The expanded basket cluster 7 and the braided net 6 capture the thrombus inside. By further operating the control component, the shape and position of the basket cluster 7 and the braided net 6 can be fine-tuned to ensure that the thrombus is completely surrounded and fixed.
[0025] The control assembly includes: a fixed joint 3, which is sleeved on one end surface of the sleeve 1, and a movable joint 5 is provided on one side of the fixed joint 3, and one side surface of the movable joint 5 is fixedly connected to the pulling wire 4, and the pulling wire 4 can be controlled by pulling or pushing the movable joint 5;
[0026] When it is necessary to remove the thrombus, the control component is operated, that is, the movable joint 5 is pulled. The movement of the movable joint 5 drives the pulling wire 4 to slide inside the sleeve 1. The sliding of the pulling wire 4 causes the auxiliary rod 16 to move, thereby causing the auxiliary folding sheet 10 to gradually expand from a contracted state. After ensuring that the thrombus is stably captured, the control component can be continued to be operated to shrink the basket bundle 7 and the woven net 6, thereby peeling the thrombus from the blood vessel wall. After the thrombus is peeled off, the control component is operated in reverse to restore the auxiliary folding sheet 10, the basket bundle 7 and the woven net 6 to the initial contracted state. In the contracted state, the entire remover can be smoothly withdrawn from the blood vessel to complete the entire cerebral thrombus removal process.
[0027] In this embodiment
[0028] In the initial state, the resectoscope is in an unexpanded state, the basket cluster 7 and the braided net 6 are in a compressed state, the auxiliary folding sheet 10 is also in a contracted state, and the front guide wire 9 is used to navigate the resectoscope to the location of the cerebral thrombus. Through precise operation, the front guide wire 9 penetrates and contacts the thrombus to accurately position the resection mechanism;
[0029] The control component is operated, that is, the movable joint 5 is pulled. The movement of the movable joint 5 drives the pulling wire 4 to slide inside the sleeve 1, so that the auxiliary folding sheet 10 gradually expands from the contracted state. The edge of the auxiliary folding sheet 10 becomes thinner and narrower due to the expansion, and can be inserted into the thrombus to play an auxiliary fixation role. The expansion of the auxiliary folding sheet 10 drives the basket cluster 7 and the braided net 6 to expand at the same time, forming a space that can accommodate and capture the thrombus;
[0030] The expanded basket cluster 7 and the woven net 6 capture the thrombus inside. By further operating the control component, the shape and position of the basket cluster 7 and the woven net 6 can be fine-tuned to ensure that the thrombus is completely surrounded and fixed. After ensuring that the thrombus is stably captured, the control component can be continued to be operated to shrink the basket cluster 7 and the woven net 6, thereby peeling the thrombus from the blood vessel wall. After the thrombus is peeled off, the control component is operated in reverse to restore the auxiliary folding sheet 10, the basket cluster 7 and the woven net 6 to the initial contracted state. In the contracted state, the entire resector can be smoothly withdrawn from the blood vessel to complete the entire cerebral thrombus removal process.
[0031] The scope is not limited to this. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and utility model concept of the utility model, which should be included in the protection scope of the utility model.
Claims
1. A cerebral thrombectomy device with a protective function, comprising a sleeve (1), characterized in that: A cutting mechanism is arranged at one end of the sleeve (1), a front guide wire (9) for penetrating a thrombus is arranged at a side of the cutting mechanism opposite to the sleeve (1), and a control component capable of controlling the cutting mechanism to switch on and off is arranged at the end of the sleeve (1) opposite to the cutting mechanism.
2. The cerebral thrombectomy device with protective function according to claim 1, characterized in that: The cutting mechanism comprises: a fixing ring (8), the fixing ring (8) being fixedly connected to one side surface of a front end guide wire (9), a through opening (15) being provided at the center of the fixing ring (8) for facilitating engagement with one side surface of a sleeve (1), a braided net (6) being fixedly connected to the side of the fixing ring (8) opposite to the front end guide wire (9), and a plurality of net basket clusters (7) being provided on one side of the braided net (6).
3. The cerebral thrombectomy device with protective function according to claim 2, characterized in that: The cutting mechanism further comprises: a connecting plate (13), the connecting plate (13) being located at the other end of the basket cluster (7) away from the woven net (6), the connecting plate (13) being fixedly mounted at the center of a sliding ring (2), the sliding ring (2) being sleeved on one end surface of the sleeve (1) and being able to slide on the surface of the sleeve (1), an auxiliary rod (16) being fixedly connected to one side surface of the sliding ring (2), a limiting block (11) being sleeved on the other end surface of the auxiliary rod (16), and an auxiliary folding sheet (10) being arranged on the other side surface of the limiting block (11).
4. The cerebral thrombectomy device with protective function according to claim 3, characterized in that: One side surface of the auxiliary folding sheet (10) is fixedly connected to the side surface of the limiting block (11), and the other side surface is fixedly installed with a pulling wire (4), which is located inside the sleeve (1) and can slide inside the sleeve (1).
5. The cerebral thrombectomy device with protective function according to claim 4, characterized in that: The cutting mechanism also includes: an inner tube (12), the inner tube (12) is sleeved on the outer surface of the pulling wire (4), the inner tube (12) is also located inside the sleeve (1), a fixing plate (14) is provided at one end of the inner tube (12), the fixing plate (14) is located inside the sleeve (1), the inner tube (12) is in an immovable state inside the sleeve (1), and the inner tube (12) penetrates the center of the auxiliary folding sheet (10) and is fixedly connected to one end of the auxiliary rod (16).
6. The cerebral thrombectomy device with protective function according to claim 5, characterized in that: The control component comprises: a fixed joint (3), the fixed joint (3) is sleeved on one end surface of the sleeve (1), a movable movable joint (5) is provided on one side of the fixed joint (3), and one side surface of the movable joint (5) is fixedly connected to the pulling wire (4).