Patent ID: 7169154

Claim:
A medical retrieval device comprising: a proximal handle; a sheath extending distally from the handle and including a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath; opposing first and second hemi-baskets, each hemi-basket comprising a loop and a back stay, the opposing first and second hemi-baskets having a collapsed position in which the first and second hemi-baskets are collapsed within the lumen of the sheath and another position in which the first and second hemi-baskets extend from the distal end of the inner sheath and out of the lumen, the first and second hemi-baskets being joined at a base and unattached to each other at their distal ends, the first and second hemi-baskets being moveable between an open position and a closed position with the first and second hemi-baskets being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material.