Device for mechanical lithotripsy and removal of calculi that form in the bile duct or in the urinary system

摘要

The device for mechanical lithotripsy and removal of stones that form in the bile duct or urinary system has a stone collection basket at a distal end of a tube and two actuators at the proximal end of the tube. A cable runs through the tube and connects each actuator to the basket. The actuators are screw drives and form a common structural unit that is concentric to the tube and the cable. One actuator controls the opening and closing of the basket while the other actuator controls the force transmitted through the cable to the basket to allow for crushing of the stone in the basket.

主权项

1. A device for mechanical lithotripsy and removal of calculi that form in
the be duct or in the urinary system, for use in connection with an endoscopic retrograde cholangiopancreatography, the device comprising:
a stone collecting basket arranged on a distal end of the device,a cable connected to said stone collecting basket and guided in a tube for initiating an opening or closing movement of said stone collecting basket for receiving the calculus,an actuation device arranged on a proximal end of both the tube and the cable, said actuation device comprisinga first actuating element configured as a screw drive, the first actuating element for the lithotripsy of the calculus,a second actuating element configured as a screw drive, the second actuating element for an opening and a dosing movement of the stone collecting basket,the first actuating element and the second actuating element forming a common structural unit that is arranged substantially concentrically to the tube and the cable,a turning handle coupled to a switching device, the turning handle substantially concentrically to the cable and the tube, the turning handle having a first position for the lithotripsy of the calculus and a second position for the opening and the closing movement of the stone collecting basket, andthe switching device having a first position where the switching device is coupled to the first actuating element for the lithotripsy of the calculus and a second position where the switching device is coupled to the second actuating element for the opening and the closing movement of the stone collecting basket.