Patent ID: 6656191
Filing Date: 2003-12-02
Classification: A61B

Abstract:
A retrieval basket device comprising:a flexible sheath; a control wire which is inserted in said flexible sheath to be movable therein along an axis of said flexible sheath; and a basket constructed from a plurality of resilient wires and connected to a distal end of said control wire, wherein advancing and retreating movements of said control wire in said flexible sheath cause said basket to project out of, and retract into, a distal end of said flexible sheath whereby said basket bulges and narrows, respectively; said plurality of resilient wires being positioned at non-uniform angular intervals as viewed from the axial direction of said control wire, so that a first angular interval between two adjacent resilient wires of said plurality of resilient wires is greater than a second angular interval between any other two adjacent resilient wires of said plurality of resilient wires; wherein each of said two adjacent resilient wires positioned at said first angular interval is more flexible than any other resilient wires of said plurality of resilient wires.