Patent ID: 6299612
Filing Date: 2001-10-09
Classification: A61B

Abstract:
A method of producing a wire loop type instrument for an endoscope having a control wire axially movably inserted in a flexible sheath, and a wire loop connected to a distal end of said control wire, said wire loop being formed by an elastic wire, wherein when said control wire is advanced axially, said wire loop projects from a distal end of said flexible sheath and expands in a loop shape by its own elasticity, whereas when said control wire is retracted axially, said wire loop is pulled into the distal end of said flexible sheath and folded, said method comprising:forming said wire loop with an elastic wire which is a stranded wire formed by twisting together a plurality of thin metal wires; andtwisting together a pair of said elastic wires extending from a rear end of said wire loop in an opposite direction to a direction of twist of each of said elastic wires, thereby forming said control wire.