Patent ID: 6648837
Filing Date: 2003-11-18
Classification: A61M

Abstract:
A medical guide wire comprising:an elongated flexible core member which is circular in cross section, the core member having a leading end portion fixed to a head plug and also having a rearward portion; a helical spring which is concentrically and loosely wound around said core member from the head plug to its rearward portion in the manner that a space appears between said leading end portion and said helical spring; said helical spring having a diameter-equally-reduced front portion, a diameter-equally-increased rear portion and a tapered portion between said front and rear portions; a gap stopper provided to stop a gap between a halfway portion of said tapered portion of said helical spring and said core member; line element turns of said helical spring being tight from said gap stopper to a rearward portion of said helical spring, and line element turns of said helical spring being loose from said gap stopper to the head plug; and a blood stream path provided within said helical spring to be directed from said gap stopper to the head plug when said leading end portion reaches a vascular stricture area.