CN215874831U

CN215874831U - Intracranial artery thrombus removal support

Info

Publication number: CN215874831U
Application number: CN202122267589.XU
Authority: CN
Inventors: 杨俊峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-02-22
Anticipated expiration: 2031-09-18

Abstract

The utility model relates to an intracranial artery embolectomy stent, which comprises a guide wire made of shape memory alloy and an embolectomy part, wherein the embolectomy part comprises a contraction state and an expansion state, wherein the contraction state is positioned in a catheter; get the bolt portion and include that first get the bolt support and establish the second of getting outside first getting the bolt support and get the bolt support, the first near-end of getting bolt support and second and getting the bolt support all meets with the seal wire distal end, first getting bolt support and second get the bolt support all include the skeleton bone that a plurality of equidistance were arranged, and during inflation state, the space shape diameter that first getting bolt support skeleton bone formed is less than the space shape diameter that the second got bolt support skeleton bone formed. The intracranial artery thrombus taking support provided in the technical scheme can effectively solve the problems that thrombus is easy to escape and the thrombus taking is incomplete to cause poor treatment effect in the existing thrombus taking support.

Description

Intracranial artery thrombus removal support

Technical Field

The utility model relates to the technical field of thrombus removal stents, in particular to an intracranial artery thrombus removal stent.

Background

Stroke is a group of diseases that cause damage to brain tissue due to sudden rupture of cerebral blood vessels or the inability of blood to flow into the brain due to vascular occlusion, including ischemic stroke and hemorrhagic stroke. Stroke is one of the major diseases causing death and disability in humans. The vein heavy tissue type plasminogen activator thrombolysis is the primary treatment method (the medicine for dissolving thrombus for veins), but for acute large vessel occlusive ischemic stroke, the vein thrombolysis has low blood vessel recanalization rate and poor curative effect. In 2015, a plurality of clinical trials at home and abroad show that: the intravascular mechanical thrombus removal treatment for acute ischemic stroke is good after operation, and the clinical prognosis rate is all in a pure venous thrombus dissolving group, so that the intravascular thrombus removal treatment is consistently recommended as a preferred treatment scheme for acute ischemic stroke patients caused by large vessel occlusion.

The intracranial artery embolectomy is actually a stent embolectomy, the principle is that a microcatheter technology is adopted, stent embolectomy equipment reaches intracranial arteries through an internal artery channel along arteries of lower limbs, and then an embolectomy device on the front section of a catheter actively catches thrombus blocking the blood vessels to restore the smoothness of the blood vessels. In the operation process, a doctor only needs to cut a small opening of 2 mm on the thigh of a patient to send the stent into a blood vessel to reach the diseased part, so that the pain of the patient who needs to receive a craniotomy is avoided.

The thrombus in the arterial duct can be taken out by the conventional thrombus taking stent, but because the distal end of the thrombus taking stent is mostly of an open structure, the thrombus easily escapes, so that the thrombus is not completely taken out, and the treatment effect is poor. Therefore, it is necessary to design a new technical solution to comprehensively solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an intracranial artery thrombus removal stent which can effectively solve the problems of easy escape of thrombus and poor treatment effect caused by incomplete thrombus removal of the existing thrombus removal stent.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an intracranial artery embolectomy stent comprises a guide wire made of shape memory alloy and an embolectomy part, wherein the embolectomy part comprises a contraction state and an expansion state, the contraction state is positioned in a catheter, and the expansion state is not bound by the catheter; get the bolt portion and include that first get the bolt support and establish the second of getting outside first getting the bolt support and get the bolt support, the first near-end of getting bolt support and second and getting the bolt support all meets with the seal wire distal end, first getting bolt support and second get the bolt support all include the skeleton bone that a plurality of equidistance were arranged, and during inflation state, the space shape diameter that first getting bolt support skeleton bone formed is less than the space shape diameter that the second got bolt support skeleton bone formed.

In a further scheme, the first thrombus removal support and the second thrombus removal support are both of bent reticular structures when being expanded.

The remote ends of the first thrombus removal support and the second thrombus removal support are connected in a sealing mode through developing structures, and the developing structures on the two thrombus removal supports are connected through connecting wires.

The development structure is arranged on the framework of the second embolectomy support, and the development structure is distributed on the framework of the second embolectomy support at intervals.

Further, the appearance of the developing structure is football-shaped, and platinum metal is arranged in the football-shaped developing structure.

In a further aspect, the bone surfaces of the first and second thrombectomy stents are coated with an anticoagulant.

According to the intracranial artery thrombus taking support provided in the technical scheme, the second thrombus taking support is sleeved on the first thrombus taking support, so that the thrombus taking support forms a thrombus taking part combining the inner layer and the outer layer, the outer second thrombus taking support is used for capturing large-size thrombus, the first thrombus taking support on the inner layer is used for adhering small-size thrombus, and therefore small-size thrombus can be effectively prevented from escaping in the thrombus taking process, the thrombus taking effect is improved, and a better treatment effect is guaranteed. In addition, the distal ends of the first thrombus removal support and the second thrombus removal support are connected in a sealing mode through the developing structure, thrombus can be blocked to a certain extent, and the first thrombus removal support and the second thrombus removal support are prevented from escaping in the retracting process.

Drawings

FIG. 1 is a schematic structural diagram of an intracranial artery embolectomy stent described in example 1;

FIG. 2 is a schematic structural view of an intracranial artery embolectomy stent described in example 2.

In the figure: 1. a first embolectomy support; 2. a second thrombectomy support; 3. skeleton building; 4. connecting wires; 5. a developing structure; 51. platinum metal; and 6, guiding the wire.

Detailed Description

In order that the objects and advantages of the utility model will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the utility model and does not strictly limit the scope of the utility model as specifically claimed.

Example 1

The technical scheme adopted by the embodiment 1 is as shown in fig. 1, and the intracranial artery embolectomy stent comprises a guide wire 6 made of shape memory alloy and an embolectomy part, wherein the embolectomy part comprises a contraction state in a catheter and an expansion state without the constraint of the catheter; the thrombus taking part comprises a first thrombus taking support 1 and a second thrombus taking support 2 arranged outside the first thrombus taking support 1, the near ends of the first thrombus taking support 1 and the second thrombus taking support 2 are connected with the far end of a guide wire 6, the first thrombus taking support 1 and the second thrombus taking support 2 respectively comprise a plurality of frameworks 3 which are arranged at equal intervals, and the space shape diameter formed by the frameworks 3 of the first thrombus taking support 1 is smaller than the space shape diameter formed by the frameworks 3 of the second thrombus taking support 2 in the expansion state; the first thrombus removal support 1 and the second thrombus removal support 2 are both net-shaped structures formed by weaving woven nets when being expanded, and single grids are rhombic.

The distal ends of the first thrombus removal support 1 and the second thrombus removal support 2 are connected in a sealing way through a developing structure 5; the frame 3 of the second embolectomy support 2 is also provided with developing structures 5, and the developing structures 5 are distributed on the frame 3 of the second embolectomy support 2 at intervals; the developing structure 5 has a rugby-shape, and a platinum metal 51 is provided in the rugby-shape developing structure 5. In addition, in order to prevent blood clots, the present embodiment also coats the surface of the skeleton 3 of the first and second thrombectomy stents 1 and 2 with anticoagulant.

Example 2

The technical scheme adopted by the embodiment 1 is as shown in fig. 2, the intracranial artery embolectomy stent comprises a guide wire 6 made of shape memory alloy and an embolectomy part, wherein the embolectomy part comprises a contraction state in a catheter and an expansion state without the constraint of the catheter; the thrombus taking part comprises a first thrombus taking support 1 and a second thrombus taking support 2 arranged outside the first thrombus taking support 1, the near ends of the first thrombus taking support 1 and the second thrombus taking support 2 are connected with the far end of a guide wire 6, the first thrombus taking support 1 and the second thrombus taking support 2 respectively comprise a plurality of frameworks 3 which are arranged at equal intervals, and the space shape diameter formed by the frameworks 3 of the first thrombus taking support 1 is smaller than the space shape diameter formed by the frameworks 3 of the second thrombus taking support 2 in the expansion state; the first thrombus removal support 1 and the second thrombus removal support 2 are both of a bent reticular structure when expanding, and the single skeleton 3 is in a wavy line shape.

The distal ends of the first thrombus removal support 1 and the second thrombus removal support 2 are hermetically connected through a developing structure 5, and the developing structures 5 on the two thrombus removal supports are connected through a connecting wire 4; the framework 3 of the second embolectomy support 2 is also provided with developing structures 5, and the developing structures 5 are distributed on the framework 3 of the second embolectomy support 2 at intervals; the developing structure 5 has a rugby-shape, and a platinum metal 51 is provided in the rugby-shape developing structure 5. In addition, in order to prevent blood clots, the present embodiment also coats the surface of the skeleton 3 of the first and second thrombectomy stents 1 and 2 with anticoagulant.

The present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent changes and substitutions without departing from the principle of the present invention after learning the content of the present invention, and these equivalent changes and substitutions should be considered as belonging to the protection scope of the present invention.

Claims

1. An intracranial artery embolectomy stent comprises a guide wire made of shape memory alloy and an embolectomy part, wherein the embolectomy part comprises a contraction state and an expansion state, the contraction state is positioned in a catheter, and the expansion state is not bound by the catheter; the method is characterized in that: get the bolt portion and include that first get the bolt support and establish the second of getting outside first getting the bolt support and get the bolt support, the first near-end of getting bolt support and second and getting the bolt support all meets with the seal wire distal end, first getting bolt support and second get the bolt support all include the skeleton bone that a plurality of equidistance were arranged, and during inflation state, the space shape diameter that first getting bolt support skeleton bone formed is less than the space shape diameter that the second got bolt support skeleton bone formed.

2. The intracranial arterial thrombectomy stent of claim 1, wherein: the first and second stent are both curved mesh structures when expanded.

3. The intracranial arterial thrombectomy stent of claim 1, wherein: the first thrombus taking support and the second thrombus taking support are both net-shaped structures formed by weaving woven nets when being expanded.

4. The intracranial arterial thrombectomy stent of claim 1, wherein: the far ends of the first embolectomy support and the second embolectomy support are connected in a sealing mode through the developing structures, and the developing structures on the two embolectomy supports are connected through the connecting wires.

5. The intracranial arterial thrombectomy stent of claim 1, wherein: the development structure is also arranged on the frame of the second embolectomy support and is distributed on the frame of the second embolectomy support at intervals.

6. The intracranial artery embolectomy stent of claim 4 or 5, wherein: the appearance of the developing structure is football-shaped, and platinum metal is arranged in the football-shaped developing structure.

7. The intracranial arterial thrombectomy stent of claim 1, wherein: the surface of the framework of the first thrombus removal support and the surface of the framework of the second thrombus removal support are coated with anticoagulant.