Patent ID: 6423012
Filing Date: 2002-07-23
Classification: A61M

Abstract:
A medical guide wire comprising:a core member having a flexible front end portion. rectangular in cross section; a helical spring wound around the flexible front end portion of the core member; the core member having a torsional rigidity coefficient of 16 or less in terms of KÃ—103; and the helical spring having a helical diameter-to-line diameter ratio in the range of 2.5Ëœ3.5. where the torsional rigidity coefficient is a divided value of (a maximum torsional stress based on a torsional moment to which the core member is subjected)/(the torsional moment to which the core member is subjected), the helical diameter-to-line diameter ratio is a value of (a mean value of outer and inner diameters of the helical spring)/(a line element diameter of the helical spring).