Device for endoscopic removal of stones or concrements from a bile and pancreatic duct or foreign bodies and polyps subsequent to polypectomy in the upper or lower gastrointestinal tract
View Patent ↗A device ( 1 ) for endoscopic removal of stones or concrements from a bile and pancreatic duct or foreign bodies and polyps subsequent to polypectomy in the upper or lower gastrointestinal tract comprises a cable ( 9 ) guided in a tube ( 2 ) and further comprises, on its proximal end, an actuation element ( 3 ) for an axial displacement of the cable ( 9 ) within the tube ( 2 ). The cable ( 9 ) receives, on its distal end, a collecting basket ( 16 ) formed by at least four elastic basket wires ( 17 ), said basket wires ( 17 ) being bundled at one end on the cable ( 9 ) and at another end on a guide element ( 18 ). The basket wires ( 17 ) bear against the end of the tube ( 2 ) such that an axial displacement of the cable ( 9 ) leads to a loop-like contraction or expansion of the collecting basket ( 16 ) and to a twisting of the collecting basket ( 16 ) about its longitudinal axis. The tube ( 2 ) is configured as a double-lumen tube, the cable ( 9 ) being arranged in a first lumen ( 8 ) and a guide wire ( 5 ) being arranged in a second lumen ( 19 ), and a distal end of the guide wire ( 5 ) extending axially beyond the tube ( 2 ) is not guided relative to the collecting basket ( 16 ).
1. A device for endoscopic removal of stones or concrements from a bile and pancreatic duct or foreign bodies and polyps subsequent to polypectomy in the upper or lower gastrointestinal tract, said device comprising:
a cable guided in a tube;
the tube comprising, on a proximal end, an actuation element for an axial displacement of the cable within the tube;
said cable comprising, on a distal end, a collecting basket formed by at least four elastic basket wires;
said basket wires being bundled at one end on the cable and at another end on a guide element, those basket wires which bear against the end of the tube leading, upon an axial displacement of the cable, to a loop-like contraction or expansion of the collecting basket and to a rotation of the collecting basket about a longitudinal axis of the collecting basket,
wherein
the tube is configured as a double-lumen tube, the cable being arranged in a first lumen and a guide wire being arranged in a second lumen, and the first lumen extends next to the second lumen within the tube;
a distal end of the guide wire extending axially beyond the tube is not guided relative to the collecting basket; and
the collecting basket executes the rotation through approximately 130°.
2. The device of claim 1 wherein in an expanded state, the collecting basket has a spherical outer contour.
3. The device of claim 1 wherein in an expanded state the guide wire penetrates through a spatial stretch of the expanded collecting basket.
4. The device of claim 1 wherein the guide element has a cartridge-shaped configuration.
5. The device of claim 1 wherein a first sluice branching off at an acute angle from the tube is arranged between the proximal end of the tube and the actuation element, a longitudinal channel of this sluice serves to receive the guide wire and is connected with the second lumen.
6. The device of claim 5 wherein a nipple for introducing a liquid into the lumen which receives the guide wire branches off from the first sluice.
7. The device of claim 5 wherein a second sluice is arranged between the actuation element and the first sluice, said second sluice receives the cable and comprises a connecting nipple which is connected with the first lumen.
8. The device of claim 1 wherein the actuation element comprises a guide shaft which is connected to the tube and comprises a longitudinal slit, the actuation element further comprising a slide which is connected to the cable and guided in said longitudinal slit.
9. The device of claim 8 , wherein the guide shaft comprises a thumb ring and the slide is configured in one piece with two finger rings.