Auxiliary support for intracranial thrombus extraction

Abstract

The utility model discloses an intracranial thrombus extraction auxiliary support, which belongs to the technical field of supports for cerebral thrombosis operations, and comprises a thrombus extraction support, the thrombus extraction support comprises a sleeve, a connecting component is arranged in the sleeve, one end of the connecting component is fixedly connected with a support main body, the support main body comprises an outer support and an auxiliary support, and the outer support is fixedly connected with the auxiliary support. One end of the outer support and one end of the auxiliary support are both fixedly connected with one end of the connecting assembly, a catheter is arranged in the auxiliary support, one end of the catheter is installed on the connecting assembly, an original single support in the thrombectomy support is arranged to be the outer support, and the auxiliary support is additionally arranged in the outer support; according to the thrombus removing support, a doctor can more conveniently remove thrombus, it is guaranteed that the removed thrombus is not prone to falling off from the thrombus removing support, the thrombus removing frequency of the doctor is reduced, meanwhile, the thrombus removing efficiency is improved, and therefore the danger of a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brackets used in cerebral thrombosis surgery, in particular to an intracranial thrombus removal auxiliary bracket. Background Art

[0002] Cerebral thrombosis stent removal surgery is a relatively common surgery in clinical practice. The surgery can improve the blood supply to cerebral thrombosis and relieve local brain tissue ischemia and hypoxia. Cerebral thrombosis stent removal surgery is generally suitable for patients who are older, have severe conditions or have contraindications to thrombolysis.

[0003] According to a thrombus removal device proposed by announcement number: CN214157448U, the utility model provides a thrombus removal device, the thrombus removal device comprises a handle, a pushing device and a thrombus removal bracket, the pushing device comprises a guide wire and a hypotube wrapped around the outside of the guide wire, wherein the distal end of the guide wire is a sharpened structure, and a spring coil is provided on one end of the guide wire extending from the handle head out of the shell and extending to pass through the thrombus removal bracket, so that the part of the thrombus removal device in contact with the inner wall of the blood vessel has excellent flexibility and is not easy to damage the inner wall of the blood vessel; the hypotube is a four-way hypotube made of a high-elastic shape memory alloy, which can smoothly pass through tortuous blood vessels, so that the thrombus removal device can reach the distal end of the lesion site without the assistance of a catheter.

[0004] According to the above introduction, the existing stent for intracranial thrombectomy has only one main stent, so it is not easy to clean the thrombus when sampling it, and multiple sampling operations are required, which not only increases the difficulty of the operation, but also increases the surgical risk for patients. In order to solve the above problems, we propose an intracranial thrombectomy auxiliary stent. Utility Model Content

[0005] The purpose of the utility model is to provide an auxiliary stent for intracranial thrombectomy. By adding an auxiliary stent inside the original single stent, it is not only convenient for doctors to clean up the thrombus, but also reduces the number of times doctors clean up the thrombus, thereby improving the safety of the patient's operation and solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an intracranial thrombectomy auxiliary bracket, comprising a thrombectomy bracket, the thrombectomy bracket comprising a sleeve, a connecting component is arranged inside the sleeve, one end of the connecting component is fixedly connected to a bracket body, the bracket body comprises an outer bracket and an auxiliary bracket, one end of the outer bracket and the auxiliary bracket are both fixedly connected to one end of the connecting component, a catheter is arranged inside the auxiliary bracket, and one end of the catheter is installed on the connecting component.

[0007] Preferably, the connecting assembly includes a connecting pipe and a connecting block, the connecting pipe is inserted into the interior of the sleeve, the connecting block is installed at one end of the connecting pipe, one end of the outer bracket and the auxiliary bracket are fixedly connected to the surface of the connecting block, and one end of the catheter passes through the auxiliary bracket and is installed at the center of the connecting block.

[0008] Preferably, a balloon is provided on the surface of one end of the catheter away from the connecting block, and the balloon is elliptical.

[0009] Preferably, a guide head is installed at one end of the balloon away from the catheter, and one end of the guide head is arranged in an arc shape.

[0010] Preferably, the center of the connection block is arranged as a cavity, and one end of the conduit is connected with the connection pipe through the connection block.

[0011] Preferably, the catheter located at the balloon position is provided with ventilation holes, and the ventilation holes are distributed around the catheter.

[0012] Preferably, a first channel region is formed between the outer support and the auxiliary support, and a second channel region is formed between the auxiliary support and the catheter.

[0013] Preferably, a rubber sleeve is provided on the outer wall of the sleeve close to one end of the bracket body, and the edge of the rubber sleeve is arranged in an arc shape.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides an intracranial thrombectomy auxiliary bracket, which sets the original single bracket as an outer bracket in the thrombectomy bracket and adds an auxiliary bracket inside the outer bracket, so that doctors can make the process of clearing blood clots more convenient and ensure that the cleared blood clots are not easy to fall off the thrombectomy bracket, which not only reduces the number of times doctors remove blood clots, but also improves the efficiency of clearing blood clots, thereby reducing the risk to patients. 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 structure of the outer bracket and the auxiliary bracket of the utility model;

[0018] Figure 3 It is a partial cross-sectional schematic diagram of the thrombus removal bracket structure of the utility model;

[0019] Figure 4 It is a schematic cross-sectional view of the connecting block structure of the utility model.

[0020] Numbers in the figure: 1. thrombectomy stent; 11. sleeve; 12. connecting assembly; 121. connecting tube; 122. connecting block; 13. stent body; 131. outer stent; 132. auxiliary stent; 2. catheter; 3. balloon; 4. guide head; 5. vent; 6. first channel area; 7. second channel area; 8. rubber sleeve. 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] The utility model provides Figures 1 to 4 The illustrated intracranial thrombus removal auxiliary stent comprises a thrombus removal stent 1, wherein the thrombus removal stent 1 comprises a sleeve 11, wherein a connecting assembly 12 is disposed inside the sleeve 11, and one end of the connecting assembly 12 is fixedly connected to a stent body 13. The stent body 13 comprises an outer stent 131 and an auxiliary stent 132, wherein one end of each of the outer stent 131 and the auxiliary stent 132 is fixedly connected to one end of the connecting assembly 12, wherein a catheter 2 is disposed inside the auxiliary stent 132, and one end of the catheter 2 is mounted on the connecting assembly 12.

[0023] By setting the original single stent in the thrombus removal stent 1 as the outer stent 131 and adding an auxiliary stent 132 inside the outer stent 131, it can make it more convenient for doctors to clear blood clots and ensure that the cleared blood clots are not easy to fall off the thrombus removal stent 1. It not only reduces the number of times doctors remove blood clots, but also improves the efficiency of clearing blood clots, thereby reducing the risk to patients.

[0024] The external stent 131 is made of medical metal materials (such as nickel-titanium alloy) with good flexibility and support, and is designed to adapt to the natural curvature of blood vessels, so that doctors can accurately locate the thrombus. The grid structure of the external stent 131 not only ensures a certain degree of blood flow, but also effectively captures larger thrombi, providing a solid foundation platform for subsequent auxiliary stent intervention.

[0025] The additional auxiliary stent 132 inside adopts a finer mesh design, which can not only capture small thrombus fragments that may be missed by the outer stent, but also form a close synergy with the outer stent 131 to further enhance the ability to capture and fix thrombi. The auxiliary stent 132 may use materials with higher density and smaller pore size to ensure that even tiny thrombus particles can be effectively intercepted to prevent them from falling back into the blood during the thrombus removal process and causing potential embolism risks.

[0026] In order to achieve smooth interaction and operation of the inner and outer stents, the two may be connected by a special connection mechanism, such as using a retractable or hinged connection point, so that the doctor can flexibly control the deployment of the auxiliary stent 132 when releasing it, ensuring a perfect fit with the outer stent 131 to form a closed and stable thrombus capture cavity.

[0027] Through this dual-stent design, in actual surgical operations, the doctor first places the outer stent 131 into the thrombus site, and then releases the auxiliary stent 132. The combined use of the two significantly improves the integrity and efficiency of thrombus removal. This design reduces the number of operations that require repeated stent placement and removal, shortens the operation time, and also greatly reduces the risk of stroke or other complications caused by thrombus detachment, thereby providing patients with a safer and more efficient treatment plan.

[0028] The connecting assembly 12 includes a connecting tube 121 and a connecting block 122. The connecting tube 121 is inserted into the inside of the sleeve 11, and the connecting block 122 is installed at one end of the connecting tube 121. One end of the outer bracket 131 and the auxiliary bracket 132 are fixedly connected to the surface of the connecting block 122. One end of the catheter 2 passes through the auxiliary bracket 132 and is installed at the center of the connecting block 122. The connecting tube 121 and the connecting block 122 can cooperate to drive the bracket body to move inside the sleeve 11, thereby facilitating the cleaning of thrombi in the blood vessels.

[0029] A balloon 3 is provided on the surface of one end of the catheter 2 away from the connecting block 122. The balloon 3 is elliptical in shape. The catheter 2 located at the position of the balloon 3 is provided with ventilation holes 5. The ventilation holes 5 are distributed around the catheter 2. The catheter 2 is filled with gas, which can open the balloon 3 through the ventilation holes 5. The opening of the balloon 3 can provide an expansion effect on the patient's blood vessels, thereby facilitating the stent body 13 to clear the thrombus.

[0030] A guide head 4 is installed at one end of the balloon 3 away from the catheter 2. One end of the guide head 4 is arranged in an arc shape. The guide head 4 can provide guidance for the thrombectomy stent 1 inside the patient's blood vessel.

[0031] The center of the connection block 122 is set as a cavity, and one end of the catheter 2 is connected to the connection tube 121 through the connection block 122, so that the inside of the catheter 2 is conveniently filled with gas through the connection tube 121, so as to control the opening and closing state of the balloon 3.

[0032] A first channel area 6 is formed between the outer support 131 and the auxiliary support 132, and a second channel area 7 is formed between the auxiliary support 132 and the catheter 2. The cooperation of the first channel area 6 and the second channel area 7 can provide a placement position for the cleared thrombus, so that the cleared thrombus can be moved out of the blood vessel.

[0033] A rubber sleeve 8 is provided on the outer wall of the sleeve 11 near one end of the stent body 13. The edge of the rubber sleeve 8 is arranged in an arc shape, which can provide protection for the end of the sleeve 11 and prevent the end of the sleeve 11 from causing damage to the patient's blood vessels.

[0034] In a specific embodiment, the sleeve 11 is a medical catheter, which is located at one end near the stent body 13, meaning that the sleeve is designed to be used in conjunction with a certain vascular stent to assist in the accurate placement of the stent. In this design, a key safety improvement is added - a rubber sleeve 8 is installed on the outer wall of the sleeve 11 at one end near the stent body 13.

[0035] The rubber sleeve 8 is made of a soft and elastic medical grade rubber material, ensuring that it can fit tightly against the outer wall of the cannula 11 without exerting unnecessary pressure on the blood vessel wall. The edge of the rubber sleeve is carefully designed to be a smooth arc shape, and this detail greatly improves the safety and comfort of the device. The arc-shaped edge can effectively reduce the friction and compression damage to the inner wall of the blood vessel caused by the movement of the instrument during the surgical operation, thereby protecting the patient's blood vessels from physical damage and reducing the risk of surgical complications.

[0036] In addition, the material selection of the rubber sleeve 8 also takes biocompatibility into consideration, ensuring that it will not cause adverse reactions, such as inflammation or allergies, when it exists in the human body for a short or long period of time. The thickness and elasticity of the rubber sleeve are also strictly calculated and tested, aiming to provide adequate protection while not affecting the flexibility of the sleeve and the doctor's operating feel, ensuring a smooth operation.

[0037] In summary, by assembling the rubber sleeve 8 with a circular arc edge on the outer wall of one end of the cannula 11, not only the safety of the operation is significantly improved and the potential damage to the patient's blood vessels is reduced, but also the humanized considerations and the fine combination of technology in the design of medical equipment are reflected. This design improvement is based on a deep understanding of clinical needs and patient safety principles, and provides a safer and more effective solution for the field of interventional treatment.

[0038] During specific use, first, the original single stent in the thrombectomy stent 1 is set as an outer stent 131, and an auxiliary stent 132 is added inside the outer stent 131, and then the thrombectomy stent 1 is connected to the connection group component. The cooperation of the connecting tube 121 and the connecting block 122 in the connecting component 12 can drive the stent body to move out of the sleeve 11. At the same time, the inside of the catheter 2 is filled with gas through the connecting tube 121, so that the opening and closing state of the balloon 3 can be controlled. After the inside of the catheter 2 is filled with gas, the balloon 3 can be opened through the vent 5. The opening of the balloon 3 can provide an expansion effect on the patient's blood vessels. The removed outer stent 131 and auxiliary stent 132 will expand automatically, thereby facilitating the cleaning of the thrombus in the blood vessel, making it more convenient for the doctor to clean the thrombus, and ensuring that the cleaned thrombus is not easy to fall off from the thrombectomy stent 1, which not only reduces the number of times the doctor removes the thrombus, but also improves the efficiency of cleaning the thrombus, thereby reducing the risk to the patient.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intracranial thrombus removal auxiliary stent, characterized in that: include: A thrombus removal bracket (1), the thrombus removal bracket (1) comprising a sleeve (11), a connecting component (12) being arranged inside the sleeve (11), and a bracket body (13) being fixedly connected to one end of the connecting component (12); The support body (13) comprises an outer support (131) and an auxiliary support (132); one end of each of the outer support (131) and the auxiliary support (132) is fixedly connected to one end of the connection component (12); a catheter (2) is provided inside the auxiliary support (132); one end of the catheter (2) is mounted on the connection component (12).

2. The intracranial thrombus removal auxiliary stent according to claim 1, characterized in that: The connection assembly (12) comprises a connection pipe (121) and a connection block (122); the connection pipe (121) is inserted into the interior of the sleeve (11); the connection block (122) is mounted on one end of the connection pipe (121); one end of the outer bracket (131) and the auxiliary bracket (132) are fixedly connected to the surface of the connection block (122); and one end of the catheter (2) passes through the auxiliary bracket (132) and is mounted at the center of the connection block (122).

3. The intracranial thrombus removal auxiliary stent according to claim 2, characterized in that: A balloon (3) is provided on the surface of one end of the catheter (2) away from the connecting block (122), and the balloon (3) is elliptical.

4. The intracranial thrombus removal auxiliary stent according to claim 3, characterized in that: A guide head (4) is installed at one end of the balloon (3) away from the catheter (2), and one end of the guide head (4) is arranged in an arc shape.

5. The intracranial thrombus removal auxiliary stent according to claim 3, characterized in that: The center of the connection block (122) is arranged as a cavity, and one end of the conduit (2) is connected to the connection pipe (121) through the connection block (122).

6. The intracranial thrombus removal auxiliary stent according to claim 5, characterized in that: The catheter (2) located at the position of the balloon (3) is provided with ventilation holes (5), and the ventilation holes (5) are distributed along the periphery of the catheter (2).

7. The intracranial thrombus removal auxiliary stent according to claim 1, characterized in that: A first channel region (6) is formed between the outer support (131) and the auxiliary support (132), and a second channel region (7) is formed between the auxiliary support (132) and the catheter (2).

8. The intracranial thrombus removal auxiliary stent according to claim 1, characterized in that: A rubber sleeve (8) is provided on the outer wall of the sleeve (11) close to one end of the bracket body (13), and the edge of the rubber sleeve (8) is arranged in an arc shape.

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