Patent ID: 9724115
Date: 2017-08-08
CPC Classifications: A61B

Claim:
1. A stone retrieval device comprising: a sheath; a stone retrieval basket including a distal region with a plurality of basket wires and a proximal region with one or more core wires, the stone retrieval basket being contained within the sheath and movable out of a distal opening of the sheath to cause the plurality of basket wires to open into a basket shape; a lock mechanism for locking a position of the stone retrieval basket with respect to a position of the sheath; a basket force controller including a first control stage and a second control stage, the first control stage including a sensor for measuring force on the stone retrieval basket when the lock mechanism is in an unlocked position and the second control stage including a sensor for measuring force on the stone retrieval basket when the lock mechanism is in a locked position; and an automatic release mechanism that releases the stone retrieval basket when the force on the stone retrieval basket exceeds a predetermined maximum force.