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Filter screen weaving method, filter screen and embolism protector

An embolic protector and filter technology, which is applied in the field of medical devices, can solve the problems of low blood vessel wall adhesion, affecting the collection of thrombus particles, and easy thrombus outflow, etc. The effect of reducing gaps

Pending Publication Date: 2022-02-25
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

[0004] Therefore, the present invention aims to solve the technical problem that the fit degree between the mouth of the large port and the wall of the blood vessel is not high, and the small thrombus is easy to flow out, which affects the collection of thrombus particles, thereby providing a filter mesh weaving method, filter mesh and embolic protection device

Method used

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  • Filter screen weaving method, filter screen and embolism protector
  • Filter screen weaving method, filter screen and embolism protector
  • Filter screen weaving method, filter screen and embolism protector

Examples

Experimental program
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Embodiment 1

[0050] refer to Figure 1-Figure 5 As shown, the present invention provides a kind of screen weaving method, comprises the following steps:

[0051] S1: Weaving: Weaving the base material into a cylindrical mesh structure;

[0052] Among them, the base material is made of braided wire of shape memory material. The material of the specific braided wire can be set to nickel-titanium, titanium alloy, gold-cadmium alloy or copper-zinc alloy, and the filter screen made of shape memory material 1, so that it can better adapt to the shape of the inner wall of different blood vessels, and has better adherence.

[0053] In the weaving step of the S1 step, the weaving personnel weaves on the stainless steel solid metal rod 5 with an outer diameter of 6 mm, and weaves the braiding wires of 48 spindles in a one-on-one weaving mode. When weaving, the braiding wires 24 ingots are a group, two sets of braiding wires are woven in opposite directions, and two pairs of braiding wires are put ...

Embodiment 2

[0072] Such as Figure 1-Figure 5 As shown, the present invention provides an embolic protector, comprising a filter screen 1 made by the above-mentioned filter screen weaving method, a developing ring 4 is arranged on both ends of the filter screen 1, and a guide wire 2 and an outer sheath tube are also included. 3. The filter 1 is connected to the distal end of the guide wire 2, which is suitable for pushing the filter 1 away from the outer sheath 3 and releasing it to adhere to the vessel wall; the filter 1 and the guide wire 2 are installed in the outer sheath within 3.

[0073]When in use, the prepared filter screen 1 is shrunk in the outer sheath tube 3. During the operation, the outer pin tube together with the filter screen 1 is inserted into the blood vessel with thrombus in the human body, pushed to the downstream of the surgical site, and then pushed Guide wire 2, withdraw the filter screen 1 from the outer sheath tube 3. At this time, after the filter screen 1 lea...

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Abstract

The invention relates to a filter screen weaving method, a filter screen and an embolism protector. The filter screen weaving method comprises the following steps: weaving is conducted, specifically a base material is woven into a cylindrical net-shaped structure; and closing-up is conducted, specifically, closing-up is conducted on the end portion of the net-shaped structure, and the two interweaving lines of each interweaving point of the end portion of the net-shaped structure are connected to a positioning piece of a positioning structure in a winding mode in the direction deviating from each other till the two interweaving lines of the same interweaving point are interwoven with each other. According to the invention, the radial supporting force of the large port surface is improved, and gaps between a large port face and the inner wall of the blood vessel are reduced, so that small thrombus cannot flow out from the gaps between the large port face and the thrombus wall, the thrombus particle collecting capacity of the filter screen is improved, and the using effect of the embolism protector is improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a filter screen weaving method, a filter screen and an embolic protector. Background technique [0002] An embolus is a mass within a blood vessel that becomes lodged in a narrowed vessel causing blockage of a blood vessel in a distal part of the body, such as in valve repair or replacement surgery where manipulation of a calcified valve can result in calcified material, tissue particles, and other debris. Calcified material, tissue particles, and other debris have the potential to form a mass that can form an embolism. If the embolism is in the heart or aorta, the embolism can cause infarction in any part of the body. Embolic debris can migrate through the circulatory system and One way to reduce the risk of vascular occlusion, blood clots, and cerebrovascular accidents, as well as stroke, is to place an embolic protector downstream of the point of surgical treatment to ...

Claims

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Application Information

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IPC IPC(8): A61F2/01D04C3/40D04C3/48
CPCA61F2/01D04C3/40D04C3/48A61F2002/016
Inventor 李涛王辉田梦云李晓菲
Owner 上海璞慧医疗器械有限公司
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