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Saccule duct and preparation method thereof

A technology for balloon catheters and catheters, which is applied in the direction of balloon catheters, catheters, dilators, etc., which can solve the problems of poor catheter push performance and reduced outer tube strength, and achieve good push performance and reduce pressure relief time.

Active Publication Date: 2019-07-02
BIOTYX MEDICAL (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, due to the limitation of the size of the catheter by blood vessels, it is not feasible to achieve rapid pressure relief by increasing the outer diameter of the outer tube to increase the filling cavity; if the outer tube wall thickness is reduced by thermal stretching, the outer tube Reduced strength and poorer catheter pushability

Method used

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  • Saccule duct and preparation method thereof
  • Saccule duct and preparation method thereof
  • Saccule duct and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0026] The method for preparing balloon catheter of the present invention comprises the following steps:

[0027] S1. Insert the mandrel through the opening of the raw material tube, and preheat the raw material tube to a certain temperature. The preheating temperature range is 70-90°C;

[0028] Specifically, the die 20 is assembled to the notch of the stretching machine, the mandrel is passed through the opening at the rear end of the raw material tube and passed through the opening at the front end, and then the mandrel and the raw material tube are passed through the entrance of the die 20 together. 21 penetrates into the through hole 23, and then passes through the outlet 22. Then set the heating temperature, turn on the heat source switch of the drawing machine, and preheat the die 20 loaded with the raw material tube. The heating temperature set is in the range of 70-90°C. After the die 20 is fully preheated, keep a constant temperature.

[0029] Furthermore, before t...

no. 1 example

[0041] Assemble the die 20 on the notch of the stretching machine, pass the mandrel through the rear opening of the nylon tube and not pass out from the front opening of the nylon tube, clamp the front end of the nylon tube with tweezers, and stretch about 10mm in length, The wall thickness of the front end of the nylon tube is thinned so that the front end of the nylon tube passes through the through hole 23 of the die 20 . Continue to push the mandrel so that the front end of the mandrel passes through the front end of the nylon tube. The mandrel and the nylon tube are passed through the inlet 21 of the die 20 and the front end of the nylon tube is passed through the outlet 22 . That is, the mandrel and the front end of the nylon tube pass through the through hole 23 and expose a part at the front end of the outlet 22 , and most of the rest are at the rear end of the inlet 21 .

[0042] The heating temperature is set on the heating module of the stretching machine to prehea...

no. 2 example

[0048] This embodiment differs from the first embodiment in that the heating temperature set by the heating module is 80° C., and the stretching speed is 9 mm / s.

[0049] The outer tube prepared according to the method of this example is smooth and flat, without scratches and wrinkles, with an inner diameter of 1.12 mm, an outer diameter of 1.32 mm, and a yield strength of 119.8 MPa. It does not break when wound 10 times on a round rod with a diameter of 10 mm. . Therefore, the outer tube prepared according to the method of this embodiment also meets the requirements.

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Abstract

The invention discloses a preparation method of a saccule duct. The preparation method comprises the steps of enabling a mandrel to penetrate in from an opening of a raw material pipe, enabling the front end of the raw material pipe to penetrate in from a die inlet and penetrate out from a die outlet, and preheating the die to a certain temperature; setting initial pressure of the die, rotating the mandrel at uniform speed, and clamping the front end of the mandrel with a stretching machine to stretch the mandrel and the raw material pipe in the direction being away from the die outlet at a certain stretching speed, wherein a certain pressure is increased when a certain distance is formed by stretching; and stopping stretching, performing cooling, and drawing out the mandrel from the raw material pipe, wherein a cooling device is also arranged at the die outlet, the raw material pipe is a nylon pipe, the certain temperature range is 70-90 DEG C, and the stretching speed range is 8-10mm / s. The saccule duct prepared by the preparation method has favorable pushing properties and short pressure relief time.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a balloon catheter and a preparation method thereof. Background technique [0002] During angioplasty, balloon catheters are used to dilate narrowed or occlusive lesions in blood vessels. The balloon catheter includes a balloon, catheter and catheter seat. The balloon catheter is pushed to the lesion along the guide wire. During the pushing process, the catheter is required to have a good ability to pass through curved blood vessels and complex diseased blood vessels, so it needs to have good pushing and tracking sex. After injection of contrast medium into the balloon catheter to complete the expansion, the balloon catheter needs to be quickly released to minimize the time during which blood flow is blocked. The outer tube size and strength of the catheter have a significant impact on the catheter push performance and pressure release time. Usually, due to the limitation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/10A61M29/04B29C55/22B29C55/30
CPCA61M25/0009A61M25/0043A61M25/1029A61M29/02B29C55/22B29C55/30
Inventor 蒋世俊龙汉
Owner BIOTYX MEDICAL (SHENZHEN) CO LTD
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