Stepless gradient catheter

A gradient, catheter technology, applied in the direction of catheters, etc., can solve the problems of poor bending resistance and shape retention ability, and large differences in catheter performance, and achieve good compliance performance, good lumen retention performance, and bending resistance performance. good effect

Active Publication Date: 2020-11-06
SHANGHAI HEARTCARE MEDICAL TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the performance of the connecting part between the braided section and the helical section of the currently used catheter is relatively poor, which leads to poor overall bending resistance and shape retention of the catheter

Method used

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Experimental program
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Embodiment

[0027] Such as figure 2 , image 3 As shown, the main body of the stepless gradient catheter of the present invention is composed of grids, and the grids are braided by nickel-titanium wires or stainless steel wires. The angle formed by the grid and the axial direction of the catheter gradually changes, the angle formed by the grid 3 near the end of the tube base and the axial direction of the catheter is larger, and the angle formed by the grid 4 near the head end is smaller. This design makes the grid density at the base end greater than that at the head end within a unit length, thereby achieving better support and pushability at the end of the catheter base, and better flexibility at the head end. Avoid damage to blood vessels.

[0028] Such as Figure 4 As shown, in the stepless gradient catheter of the present invention, the cross-sectional shape of the braided wire constituting the braided layer changes gradually from the base end to the head end. The cross-section...

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Abstract

The invention relates to a stepless gradient catheter, and belongs to the technical field of medical apparatus and instruments. The catheter includes a lining layer, a reinforcement layer and a coat layer; the reinforcement layer is arranged at a single knitting section; the reinforcement layer is from a catheter base end close to an operator to a head end away from the operator; and the shapes ofknitting wires of the formed knitting section of the reinforcement layer or the knitting angle between the knitting wires or the mutual bending degrees between the knitting wires are set as a stepless gradient form. Through stepless gradient changes of multiple structural forms, the stepless gradient between the catheter base end and the head end of a catheter structure can be realized, so that the catheter base end of the catheter can be good in support and pushing; and as the head end is good in flexibility, the catheter can be excellent in overall bending resistance and lumen retention, sothat the performance deficiency between sections due to multiple knitting section structures of currently adopted catheters can be avoided. The catheter is multifunctional and can be used for treatment such as internal guide wires, supports or auxiliary thrombus aspiration.

Description

technical field [0001] The invention relates to a stepless and gradually changing catheter, which belongs to the technical field of medical instruments. Background technique [0002] With the development of society and economy, profound changes have taken place in the national lifestyle, especially the aging of the population and the acceleration of urbanization. The prevalence of cardiovascular disease risk factors in China has become increasingly obvious, leading to a continuous increase in the number of cardiovascular diseases. . At present, there are about 2.2 million patients suffering from chronic total occlusion of coronary arteries in my country. Clinically, when minimally invasive interventional treatment is performed on chronic total occlusion lesions or vascular dissection, it is usually necessary to use catheters and other interventional equipment to perform treatment operations, such as balloon dilation, stent implantation and other technical means. During the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00
CPCA61M25/0053A61M25/008A61M2025/0081
Inventor 胡伟张晨朝王越王君毅时玉楠程瑞王国辉
Owner SHANGHAI HEARTCARE MEDICAL TECH CORP LTD
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