Guide wire

A technology for guide wires and guide wire parts, applied in catheters, guide wires, surgery, etc., can solve problems such as inability to improve the bonding strength of guide wire parts, difficulty in obtaining torque transmission, troublesome connection operations of guide wire parts, etc., and achieve excellent Operability, avoiding stress concentration on welded parts, preventing sudden bending (bending) or twisting effect
CN1846803AInactive Publication Date: 2006-10-18TERUMO KK
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TERUMO KK
Publication Date
2006-10-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A wire having excellent operability while ensuring flexibility at the distal end, and having improved bonding strength between a first wire part and a second wire part. It has a wire main body including a linear first wire part arranged on the distal side and a linear second wire part arranged on the proximal side of the first wire part. A coil having X-ray contrast properties is preferably provided on the outer periphery of the distal end portion of the first guide wire portion. The base end portion of the first guide wire part preferably has a constant outer diameter everywhere along its length direction, and the front end part of the second guide wire part preferably has a tapered part whose outer diameter gradually increases from the front end to the base end direction. constitute. Preferably, the outer diameter of the proximal end of the first wire guide part and the outer diameter of the distal end of the second guide wire part are the same. The outer diameters of the two guide wire parts are joined by welding on the same end surface, and a metal covering layer is preferably formed on the outer periphery of the joint part to relax the outer peripheral surface of the base end part of the first guide wire part and the outer peripheral surface of the taper part. Angle difference between.
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Description

technical field

[0001] The present invention relates to a guide wire, and more particularly to a guide wire used for guiding a catheter into body cavities such as blood vessels and bile ducts. Background technique

[0002] For example, such as PTCA (Percutaneous Transluminal Coronary Angioplasty: percutaneous coronary angioplasty), the treatment of difficult-to-operate parts, or the treatment for the purpose of reducing damage to the human body, or the examination of cardiac angiography, etc. With catheters, a guide wire is used to guide the catheter. Regarding this guide wire for PTCA, when using it, in the state where the tip of the guide wire protrudes from the tip of the balloon catheter, the guide wire and the balloon catheter are inserted into the vicinity of the narrowed part of the blood vessel at the target site, and the guide wire Guide the tip of the balloon catheter to the vicinity of the narrowed part of the blood vessel.

[0003] In addition, in the treatment...

Claims

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