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Catheter and manufacturing method

A catheter and intermediate layer technology, applied in catheters, coatings, etc., can solve problems such as the inability to meet the performance requirements of clinical operations

Pending Publication Date: 2020-10-30
广东海思卡尔医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal braided intermediate layer plays a decisive role in catheter performance, but the existing catheter structure cannot meet the performance requirements of clinical operations

Method used

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  • Catheter and manufacturing method
  • Catheter and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The catheter middle layer 13 of the catheter proximal section 21 adopts a stainless steel square wire braided structure, which can ensure that the catheter has a larger inner cavity and reduce the outer diameter of the catheter at the same time.

[0028] The catheter middle layer 13 of the catheter middle section 22 adopts a cross grid weaving structure, specifically, the grid pitch in the catheter middle section 22 is greater than the grid pitch in the catheter proximal section 21, so that the catheter middle section 22 also has a support and a certain flexibility.

[0029] The catheter middle layer 13 of the catheter distal section 23 adopts a single-strand wire helical winding structure. Specifically, the wire material can be heat-treated in advance, so that it has better flexibility and head-end shaping ability, provides twist control, and can effectively Protect blood vessels.

Embodiment 2

[0031] The surface of the catheter outer layer 12 is coated with a hydrophilic coating, which can increase the lubricity of the catheter and reduce the friction between the catheter and the blood vessel.

[0032] The catheter middle layer 13 of the catheter proximal section 21 adopts a nickel-titanium alloy square wire braided structure, which can ensure that the catheter has a larger lumen while reducing the inner diameter of the catheter. The nickel-titanium alloy provides excellent twist control and bending resistance.

[0033] The catheter middle layer 13 of the catheter middle section 22 adopts a cross-grid weaving structure, specifically, the grid pitch in the catheter middle section 22 is larger than the grid pitch in the catheter proximal section 21, which has both support and a certain degree of flexibility. sex.

[0034] The catheter middle layer 13 of the catheter distal section 23 adopts a double-strand wire helical winding structure, which has good flexibility, pr...

Embodiment 3

[0036] The surface of the catheter outer layer 12 is coated with a hydrophilic coating, which can increase the lubricity of the catheter and reduce the friction between the catheter and the blood vessel.

[0037] The catheter middle layer 13 of the catheter proximal section 21 adopts a stainless steel square wire braided structure, which can ensure that the catheter has a larger inner cavity and reduce the outer diameter of the catheter at the same time.

[0038] The catheter middle layer 13 of the catheter middle section 22 adopts a multi-strand wire helical winding structure, specifically, the catheter middle layer 13 of the catheter middle section 22 adopts a helical winding structure of six wires, which has both support and certain flexibility.

[0039] The catheter middle layer 13 of the catheter distal section 23 adopts a double-layer double-strand wire helical winding structure, wherein the inner layer is braided clockwise and the outer layer is braided counterclockwise,...

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Abstract

The invention discloses a catheter and a manufacturing method. The catheter comprises a catheter body, the catheter body is provided with a catheter inner layer, a catheter middle layer and a catheterouter layer. The catheter outer layer is made of a biocompatible material; the catheter body comprises a catheter near-end section, a catheter middle section and a catheter far-end section. The catheter middle layer of the catheter near-end section is of a crossed grid woven structure for providing good supporting performance and pushing force, the catheter middle layer of the catheter far-end section is of a wire spiral winding structure for providing good flexibility and shaping capacity, and therefore the performance requirement for the catheter in an operation is met. The catheter can bewidely applied to the technical field of medical instruments.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a catheter and a manufacturing method. Background technique [0002] Cardiovascular disease has gradually become the greatest threat to human health, with both morbidity and mortality ranking first. At present, cardiovascular interventional therapy has become an important treatment for vascular stenosis. As a key device in interventional surgery, the catheter provides a channel for the delivery of other devices and plays an important role in the success of the operation. During the operation, there are high requirements for the pushability, twist control and flexibility of the catheter. The metal braided intermediate layer plays a decisive role in the performance of the catheter, but the existing catheter structure cannot meet the performance requirements of clinical operations. Contents of the invention [0003] In order to solve at least one of the above-mentioned t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61M25/14
CPCA61M25/0045A61M25/0052A61M25/0053
Inventor 刘奕彤
Owner 广东海思卡尔医疗科技有限公司