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Guiding wire

A steel wire and distal technology, applied in the direction of catheter and guide wire, can solve the problems of difficult insertion of guide wire into branch blood vessels and damage to the blood vessel wall.

Inactive Publication Date: 2009-03-18
NIPRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when such a guide wire is inserted into a meandering blood vessel, the protruding part of the guide wire will slide in contact with the blood vessel wall, making it difficult to insert and withdraw the guide wire into and out of the blood vessel, and there is a possibility of damaging the blood vessel wall.
In addition, since the protruding part of the guide wire interferes with the branch part of the blood vessel, when such a guide wire is to be inserted into the branch blood vessel, it is difficult to insert the guide wire into the branch blood vessel.

Method used

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Embodiment Construction

[0037] Referring now to FIGS. 1 and 2, a first embodiment of the present invention will be described. A guide wire comprises a core wire 1 , a coiled wire assembly 2 and a distal end 3 .

[0038] When this guide wire is operated from the proximal side, its core wire 1 has: (1) suitable flexibility to follow the advancement of blood vessels, and (2) the ability to transmit rotational force or compressive force to the distal end of the guide wire. rigidity. The core wire is made of an elongated solid metal wire having flexibility and elasticity, and its distal end portion is made as a mounting portion 5 on which the coiled wire assembly 2 is mounted. In order to improve the flexibility and adaptability of the far side of the core steel wire 1, the mounting part 5 is configured to have three transition parts (three conical parts) arranged in succession, namely a transition part 6 at the proximal end, a middle transition part 7 and a transition part 7 at the proximal end. The di...

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PUM

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Abstract

A guide wire which includes: (a) a core wire formed with a mounting portion at the distal end portion; and (b) a plurality of coil wires being fitted onto the mounting portion substantially in tandem, and having different mechanical properties, the adjacent coil wires being connected with each other at the corresponding ends thereof. One of the corresponding ends of the adjacent coil wires is formed into a tapered portion gradually reducing in outer diameter toward said end. The other one of the corresponding ends is formed into a receiving end portion into which the tapered portion is inserted.

Description

technical field [0001] The present invention relates to a guide wire for guiding a catheter into a desired location in the human body for treatment and inspection. Background technique [0002] Catheters have been used in applications such as superselective angiography, percutaneous transluminal angioplasty (PTA), transcatheter arterial embolization (TAE), and percutaneous transcatheter coronary The medical procedure of arterial angioplasty (PTCA). [0003] When introducing a catheter into the human body, for example, when guiding the catheter with a guide wire in the following manner, if the catheter is inserted into an artery for treatment or inspection, since the pressure in the artery is higher than the pressure in the vein, it will is extremely difficult. Therefore, for example percutaneous cannulation methods (Seldinger method) are now used. In this method, first a guide wire is inserted into a blood vessel and stays therein, and then the catheter is advanced by fit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/09A61M25/01A61B5/02
CPCA61M2025/09083A61M25/09
Inventor 大泽新二宫内伟一
Owner NIPRO CORP