Patent ID: 6884225
Filing Date: 2005-04-26
Classification: A61M

Abstract:
1. A medical guide wire comprising a flexible line wire having a main wire portion, a core line member and a helical spring provided around a distal end of said core line member, a front end of said helical spring being fixedly interfit to a head plug provided at a tip of said core line member; a rigid portion located on a front end of aid helical spring, said rigid portion measuring 0.5 mm or less which extends lengthwisely from a top end of said head plug to a rear end of a portion in which said helical spring is fixed to said head plug, and an intermediary location is determined on an intermediary portion of said helical spring in which an intermediary boss portion is secured to said core line member to define loosely wound portion as an elastically expandable portion from a rear end of said head plug to said intermediary location; a clearance between line element turns of said loosely wound portion being within a range of 10-30% of a line diameter of said helical spring; and said loosely wound portion being approximately 24 mm in length.