Guide wire for medical treatment

A medical guide wire technology, applied in the field of medical guide wire, can solve the problems of low X-ray visibility, easy access to target blood vessels, and easy bending, and achieve good operability, improved operability, and low resistance Effect

Inactive Publication Date: 2006-01-11
JAPAN STENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, the guide wire used in the past has a diameter of about 0.4 mm. Since the diameter is small, the X-ray visibility is low, and it is necessary to improve the visibility by installing a metal core wire at the tip.
In addition, since it is thin and easy to bend, there is a problem that it is easy to enter blood vessels other than the target blood vessel

Method used

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  • Guide wire for medical treatment
  • Guide wire for medical treatment
  • Guide wire for medical treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Using a guide wire lubricated and coated with nickel-titanium alloy (diameter 0.5mm) by polyvinylpyrrolidone, the guide wire whose front end shape in Fig. 1 defined by the present invention is 45 degrees is made, wherein Alloy-like, the core wire metal is mechanically rectified and processed into a straight line, does not exhibit martensitic transformation caused by stress, and is covered with medical-grade polyurethane to make its diameter 0.89mm. The width R of the curved portion was 9.0 mm, the length L of the curved portion was 11.0 mm, and the length C of the front straight portion was 4.5 mm. In addition, the diameter of the alloy wire including the polyurethane coating at the tip portion was 0.8 mm, and the diameter of the core wire was 0.1 mm. When the obtained guide wire was pressed into a silicon tube with a diameter of 3 mm as a blood vessel model at a speed of 500 mm / min, the indentation length and resistance value were measured three times. As a result, it ...

Embodiment 2

[0055] As in Example 1, using the guide wire obtained by the present invention, the indentation resistance was measured three times using a 4 French catheter instead of the silicon tube, and the average load during indentation was 0.15N. The resistance value at the time of pulling out from the catheter was measured three times, and it was found that the average resistance value at the time of pulling out was 0.2N, and the variation was also small.

Embodiment 3

[0059] A T-shaped coronary branch model blood vessel was made using a silicon tube with a diameter of 3 mm, and when the guide wire obtained by the present invention of Example 1 was pushed in, the branch was not introduced.

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PUM

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Abstract

The aim of the invention is to guide wire for medical treatment capable of being easily introduced into a blood vessel from a blood vessel guide port at a femoral, a brachium, or a radial, easily meandered in the blood vessel, and hard to be erroneously advanced into the blood vessel at a branched part, comprising a metal core covered with a resin having a tip part bent in a smooth curved shape, characterized in that the diameter of the guide wire including a resin layer is 0.46 to 1.02 mm, an angle formed by the extension line of the tip part of the guide wire relative to a wire base line is 40 to 70 DEG , and the width dimension of the curved part is 2 mm or longer to less than 10 mm.

Description

technical field [0001] The present invention relates to a medical guide wire for introducing a catheter or an introducer used for treatment or inspection into a target site of a blood vessel. Background technique [0002] Medical guide wires are used to guide catheters or introducers into blood vessels and leave them in affected areas during diagnosis and treatment. Therefore, the medical guide wire needs to be shaped so that it can be pressed into a branched or curved blood vessel following the shape of the blood vessel without damaging the blood vessel. In recent years, the blood vessel introduction port of the catheter has shifted from the thigh to the upper arm or wrist, and this requirement has become stronger. [0003] In order to penetrate the guide wire to a desired position in the heart, the leading end of the guide wire sold on the market is shaped (shaping). Furthermore, the shape of the distal end is a functionally important factor, so that in clinical practice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/09A61M25/01A61M25/00
CPCA61M2025/09175A61M25/09A61M25/0041A61M2025/09075A61M25/01
Inventor 桥本辉夫和田富美夫
Owner JAPAN STENT TECH CO LTD
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