Clot retrieving support

A technology of thrombus and main body, which is applied in the field of thrombus extraction, can solve the problems of small thrombus easy to fall off, large radial force of the main body, endangering the patient's life, etc., and achieve the effect of avoiding cerebrovascular injury

Inactive Publication Date: 2017-12-22
南京普微森医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1) The common feature of these stents is that the stent has a uniform grid structure, and the main part of the stent is over-extruded after the main body captures the thrombus, so that the radial force of the main part is too large, and the intima of the vessel is easily damaged when the thrombus is pulled;
[0010] 2) The common feature of these stents is that the entire length and diameter of the stent are consistent. When the thrombus is captured and the stent is retracted, the small thrombus is easy to fall off and flow to the distal s

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0096] Such as Figure 4As shown, the thrombus removal stent 100 of this embodiment includes a delivery rod 20 and a stent body. The stent body 10 is connected to the delivery rod 20. The stent body 10 is made of high elastic silk and developing silk. The stent body 10 includes a stent body nearly end 11, the stent body distal end 12a, and the stent body middle part 13 connecting the stent body proximal end 11 and the stent body distal end 12a, wherein the diameter of the stent body middle part 13 is smaller than the diameter of the stent body proximal end 11 and the stent body distal end 12a , the proximal end 11 of the stent body is formed into an open wedge shape, and the distal end 12a of the stent body is formed into an open dumbbell shape. The number of knitting nodes at the distal end 12a of the stent main body is less than that at the middle part 13 of the stent main body. Other structures of the thrombus-removing stent 100 in this embodiment can be selected from any ...

Embodiment 2

[0100] Such as Figure 5 As shown, the proximal end 11 of the stent main body of the thrombus collection stent 100 of this embodiment is formed into an open wedge shape, and the distal end 12b of the stent main body is formed into a closed spherical shape.

[0101] The distal wires of the stent are bundled in a developing coil 30, and the wires at the proximal end 11 of the main body of the stent are welded in pairs to form multiple bundles of proximal wires. The tightening wire made of tungsten wire material is connected in series, and the tightening wire is welded to the delivery rod 20 .

[0102] Other structures of the thrombus-removing stent 100 in this embodiment can be selected from any one of the above-mentioned embodiments.

[0103] The thrombus-taking stent 100 of this embodiment can be prepared by the following method: it can have multiple specifications (different diameters and lengths) according to clinical needs, and a metal cylinder is processed into a spherica...

Embodiment 3

[0105] Such as Figure 6 As shown, the proximal end 11 of the stent body of the thrombus collection stent 100 of this embodiment is formed into an open wedge shape, and the distal end 12c of the stent body is formed into an umbrella shape whose diameter gradually increases away from the distal end 12c of the stent body. Such as Figure 7 As shown, the proximal end 11 of the main body of the stent forms a plurality of bundles of proximal wires 14, and the plurality of bundles of the proximal wires 14 are connected to the developing control wire 15, and the control wire 15 is connected in series with the tightening wire 16, and the tightening wire 16 links to each other with described delivery bar.

[0106] Other structures of the thrombus-removing stent 100 in this embodiment can be selected from any one of the above-mentioned embodiments.

[0107] According to the thrombus-retrieving stent 100 of the embodiment of the present invention, when the stent body 10 encloses the th...

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PUM

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Abstract

The invention provides a clot retrieving g support, comprising: a delivery rod; a support body connected with the delivery rod and forming a network woven with wire material. The support body includes a support body proximal end, a support body distal end, and a support body middle part for connecting the support body proximal end and the support body distal end, wherein the diameter of the support body middle part is less than that of the support body proximal end and that of the support body distal end, and the support body proximal end is in open wedge shape. Therefore, the clot retrieving support according to an embodiment of the invention allows blood clots to be clamped in the middle of the support more easily; during clot retrieving, the distal end and proximal end of the support can cover small clots peeled off, so that the problem is avoided that the small clots block distal or proximal vessels. The middle mesh of the support body is larger than end meshes of the support body, the support body middle part has small diameter, space is exactly reserved for the blood clots clamped to the support body, the support body middle part has moderate radial force, and vascular intima is never damaged during pulling of the blood clots.

Description

technical field [0001] The invention relates to a medical device, in particular to a thrombus-retrieving bracket. Background technique [0002] In human blood vessels, especially in the supply vessels in the region of the coronary arteries, there are often obstructions such as deposits, atherosclerotic plaques, clots, etc. These obstructions can block or interrupt blood flow. The above-mentioned obstructions in the vessels supplying the area of ​​the coronary arteries may lead to serious sequelae such as infarction. Rapid removal of these obstructions is an essential therapeutic step in the treatment of such patients. Stroke caused by thrombosis in cerebral vessels is the most serious refractory disease that endangers human health and life safety. According to statistics, there are 3 million stroke patients in China every year, and 1.2 million stroke patients die every year. For patients with cerebral apoplexy who are sent to the hospital in time, the conventional treatme...

Claims

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Application Information

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IPC IPC(8): A61B17/22A61F2/91A61F2/966A61F2/958
CPCA61B17/22A61F2/91A61F2/958A61F2/966A61F2250/0067A61F2250/0098
Inventor 吕文峰魏诗荣吕浩然
Owner 南京普微森医疗科技有限公司
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