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Instruments designed to trap, retrieve, and/or manipulate stones for the treatment of conditions such as cholelithiasis (i.e., presence of calculi in the bile duct or gallbladder). These instruments typically comprise a flexible sheath with a multiwire, self-expanding (typically nitinol) basket at the distal end and a handle at the proximal end designed to open, close, and rotate the basket. These devices are intended to be used through the working channel of an endoscope in procedures such as endoscopic retrograde cholangiopancreatography (ERCP) or laparoscopic cholecystectomy.
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