Patent ID: 7637874
Filing Date: 2009-12-29
Classification: A61M

Abstract:
1. A medical guide wire comprising: a flexible long core; a core elongated component, disposed to extend forwards from an end of said core, having a tapered shape; a helical coil, disposed about said core elongated component, secured by attachment of a coil distal end and a coil proximal end to said core elongated component; said helical coil including: an equiradial coil portion, having said coil proximal end, disposed at a portion of said core elongated component on a side of said core; a diameter decreasing coil portion, having said coil distal end, disposed to extend forwards from said equiradial coil portion, having a decreasing diameter, and having a length equal to or more than 25 mm; a middle connector, disposed at a distance equal to or less than 50 mm from said coil distal end, for attaching said helical coil to said core elongated component; wherein said helical coil has a coil filament with strands tightly wound in a range from said coil distal end to said middle connector, and in the tightly wound state, all strands of the coil filament are in complete contact, or there is a space between the strands equal to or less than 9% relative to a filament diameter t of the coil filament; a diameter ratio D said core elongated component and said helical coil satisfy a condition of d wherein said middle connector is positioned on a proximal side from a point defined between said diameter decreasing coil portion and said equiradial coil portion; a first length ratio L