Double-layer mesh cage type thrombus extraction stent and assembly thereof

A mesh cage and double-layer technology, applied in medical science, surgery, etc., can solve problems such as thrombus escape, achieve the effect of improving thrombus removal efficiency, good radial support stiffness, and reducing the risk of re-coagulation into large thrombus

Pending Publication Date: 2021-03-30
上海融脉医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a double-layer cage-type thrombectomy bracket and its components, which solve the problem that when there are many thrombi, the thrombus over-extrudes the distal mesh surface of the thrombus retrieval bracket, so that the thrombus The problem of escaping through the remote mesh surface after being crushed

Method used

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  • Double-layer mesh cage type thrombus extraction stent and assembly thereof
  • Double-layer mesh cage type thrombus extraction stent and assembly thereof
  • Double-layer mesh cage type thrombus extraction stent and assembly thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as Figure 1-Figure 3 As shown, a double-layer cage type thrombus removal bracket and its components, which include an outer tube 1, a bracket fixing tube 2, a head-end telescopic tube 3, a head-end guide cap 4 and a thrombus removal bracket 5;

[0041] The bracket fixing tube 2 is set in the outer tube 1, the proximal end of the head-end telescopic tube 3 is inserted into the distal nozzle of the bracket fixing tube 2, and the distal end of the head-end telescopic tube 3 is fixed with a hollow head-end guide cap 4;

[0042] The thrombectomy support 5 is formed by successively connecting the near-end cage support 6, the connecting cage support 7, and the far-end cage support 8, all of which are olive-shaped. The outer surface is fixed, and the far-end of the far-end net cage support 8 is fixed with the head end guide cap 4, wherein, the proximal net cage support 6, the connecting net cage support 7, and the far-end net cage support 8 are respectively provided with ...

Embodiment 2

[0049] The thrombectomy bracket 5 comprises an olive-shaped near-end cage bracket 6 and a distal cage bracket 8 connected in turn, the proximal end of the proximal cage bracket 6 is fixed to the outer surface of the bracket fixing tube 2, and the distal cage bracket The distal end of the bracket 8 is fixed to the head end guide cap 4, wherein the proximal mesh cage bracket 6 and the distal mesh cage bracket 8 are respectively provided with an internal tapered mesh surface 9 for segmental isolation. The inner tapered mesh surface 9 is a tapered mesh surface structure. Other structures are the same as in Embodiment 1.

Embodiment 3

[0051] Such as Figure 4 As shown, the thrombectomy bracket 5 is manufactured by laser cutting and heat treatment, and the first proximal tapered mesh surface 603, the second proximal tapered mesh surface 703 and the third proximal tapered mesh surface 804 are cut to form a mesh The width of the grid rods is thinner and narrower than the grid rods formed by cutting the first distal tapered mesh surface 601 , the second distal tapered mesh surface 701 and the third distal tapered mesh surface 802 . The thinner and narrower grid rods can better crush and scrape the thrombus 12, which is beneficial for the thrombus 12 to enter the mesh cage. Other structures are the same as in Embodiment 1.

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Abstract

The invention discloses a double-layer mesh cage type thrombus extraction stent and an assembly thereof, and belongs to the technical field of vascular intervention medical treatment. The thrombectomydevice comprises an outer tube, a support fixing tube, a head end telescopic tube, a head end guide cap and a thrombectomy support. The support fixing pipe is sleeved with the outer pipe, the near end of the head end telescopic pipe is inserted into a far end pipe opening of the support fixing pipe, and a hollow head end guide cap is fixed to the far end of the head end telescopic pipe. The thrombectomy stent is formed by sequentially connecting an olive-shaped near-end mesh cage stent and an olive-shaped far-end mesh cage stent, and the near-end mesh cage stent and the far-end mesh cage stent are each internally provided with an internal conical mesh surface used for segmented blocking. By means of the internal conical mesh surface, the effect of sectionally intercepting thrombus in thenet cage can be achieved, and the thrombus is prevented from excessively extruding the third far-end conical net surface of the far-end net cage bracket when the thrombus is more; therefore, the problem that the thrombus escapes through the third far-end conical net surface after being crushed is avoided.

Description

technical field [0001] The invention relates to a double-layer cage-type thrombectomy bracket and components thereof, which belong to the technical field of vascular interventional medicine. Background technique [0002] Abnormal vascular channels cause blood to flow abnormally in blood vessels. This hemodynamic abnormality can cause a series of adverse consequences such as tissue hypoxia, abnormal intravascular pressure, increased cardiac load, and even heart failure. Therefore, abnormal channels generally need to pass through Catheter interventional techniques restore or reestablish blood flow in blood vessels. Narrowing or blockage of blood vessels can have several undesirable consequences: blood flow is turbulent, slowing down can lead to blood clot formation, which restricts blood supply to downstream areas of the vasculature. When the blood clot is located in the neurovascular system, it may cause a stroke; when the blood clot is located in the pulmonary artery system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/221
CPCA61B17/221A61B2017/2212A61B2017/22094
Inventor 胡文忠李世文韩建超丁双喜
Owner 上海融脉医疗科技有限公司
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