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Thrombus withdrawing support

A mesh stent and wire technology, applied in the field of medical devices, can solve the problems of escape, small thrombus fragments, and hindering effective thrombus cutting.

Active Publication Date: 2021-04-23
上海璞慧医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in order to prevent the thrombus from escaping, the existing capture and retrieval stents often set the self-expanding stent very densely, which greatly hinders the effective cutting of the thrombus, and the thrombus fragments obtained by cutting the over-dense self-expanding stent are often very dense. Small, but easy to escape from the mesh of the self-expanding stent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Embodiment 1: A kind of guide wire

[0080] Such as Figure 1-10 , the present invention provides a thrombectomy support, which includes a guide wire 1, and a mesh support body 2 and a protective umbrella 3 sleeved on the guide wire 1; the mesh support body 2 is composed of several first metal wires 4. Helically extended along the guide wire circumferential direction, the proximal end is a semi-spindle-shaped closing, and the distal end is an opening. Among the several first metal wires 4, the distal ends of the first metal wires 4 are connected to form the first wings 5; The protective umbrella 3 is conical, and its opening is opposite to the opening of the mesh support main body 2 . The proximal end is the end of the thrombectomy bracket close to the operator, and the distal end is the end of the thrombectomy bracket away from the operator.

[0081] Preferably, the first wings 5 ​​may be arc-shaped or spike-shaped.

[0082] Preferably, the mesh stent main body 2 in...

Embodiment 2

[0123] Embodiment 2: a kind of thrombectomy method

[0124] Using the thrombectomy bracket of Example 1, the specific steps are as follows:

[0125] When removing the thrombus, the operator uses the microcatheter to transport the mesh stent main body 2 of the thrombus retrieval stent to the position of the thrombus; retracts the microcatheter, and during this process, the mesh stent main body 2 realizes self-expansion, and the expanded mesh The stent body 2 will be embedded in the thrombus to cut the thrombus, and the thrombus fragments will enter the inner cavity of the mesh stent body 2 through the mesh of the mesh stent body 2. Since the thrombus removal stent 3 has a moderate density, the thrombus fragments will not be too fragmented , and, the setting of the protective umbrella and the encrypted net prevents the thrombus fragments from drifting to the distal blood vessel with the blood flow, thereby preventing the thrombus from escaping. At the same time, the umbrella sup...

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Abstract

The invention discloses a thrombus withdrawing support and belongs to the technical field of medical appliances. The thrombus withdrawing support provided by the invention comprises a guide wire, a reticular support main body and a protective umbrella, wherein the reticular support main body and the protective umbrella sleeve the guide wire; and the reticular support main body is formed through spirally stretching a plurality of first metallic wires along the circumferential direction of the guide wire, proximal ends of the first metallic wires are of semi-fusiform retracting, distal ends of the first metallic wires are openings, and the distal ends of the first metallic wires are connected to form a wing. By arranging the first metallic wires, the reticular support main body can be used for effectively cutting a thrombus during self-dilation, and a thrombus withdrawing process can be more successful.

Description

technical field [0001] The invention relates to a thrombectomy bracket, which belongs to the technical field of medical instruments. Background technique [0002] Acute stroke is the third leading cause of death and the first cause of adult disability, among which ischemic stroke accounts for about 85% of acute stroke. Ischemic stroke is mainly caused by embolism of large blood vessels (diameter > 2 mm), and the fatality rate of embolism of large blood vessels is 53% to 92%. It can be seen that ischemic stroke is a disease with high morbidity, disability and mortality. [0003] At present, the methods that have been medically proven to be effective in the treatment of ischemic stroke mainly include drug thrombolysis and mechanical thrombectomy. Among them, drug thrombolysis is mainly aimed at the early treatment of cerebral infarction, and the drugs used mainly include rt-PA (serine protease). Concentration, rt-PA through plasminogen arginine-valine activates plasminog...

Claims

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Application Information

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IPC IPC(8): A61B17/22
CPCA61B17/22A61B2017/22038A61B2017/22045A61B2017/22094
Inventor 李涛田梦云陈万祺
Owner 上海璞慧医疗器械有限公司
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