A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/32 (2006.01) A61B 17/28 (2006.01) A61B 18/08 (2006.01) A61B 18/14 (2006.01)
Patent
CA 2220139
An endoscopic instrument includes a small diameter hollow tube, an axially displaceable wire extending through the tube, a manual actuator coupled to the proximal ends of the tube and wire for axially displacing the wire relative to the tube, a first end effector mechanically coupled to the distal end of the tube and having a proximal portion which is provided with a curved guiding channel which receives and guides a distal portion of the wire, and a second end effector mechanically coupled to the distal end of the displaceable wire and rotatably coupled to the first end effector. When arranged as a bipolar instrument, the tube and pull wire are conductive, the pull wire is covered with an electrically insulating sheath except at its very distal end, the first end effector is conductive and partially insulated and is electrically coupled to distal end of tube, and the second end effector is conductive and partially insulated and electrically coupled to the distal end of the pull wire. Both end effectors are preferably cast alloy partially coated with PTFE, and are rotatably coupled to each other with the aid of an insulating ceramic bushing-washer. According to one embodiment, the first end effector is provided with an integral axle pin. The provided endoscopic instrument, when the tube is 1.7mm in diameter, is particularly useful in endoscopic neurological procedures.
Instrument endoscopique qui comporte un tube creux (12) de petit diamètre, un fil à déplacement axial (18) qui s'étend le long du tube (12), un actionneur manuel (32) couplé aux extrémités proximales du tube (12) et du fil (18) en vue du déplacement axial du fil par rapport au tube, un premier effecteur terminal (60) mécaniquement couplé à l'extrémité distale du tube (12) et doté d'une partie proximale qui est pourvue d'un canal de guidage incurvé, et un second effecteur terminal (62) mécaniquement couplé à l'extrémité distale du fil (18) et couplé de manière rotative au premier effecteur terminal (60). Lorsqu'il est conçu comme instrument bipolaire, le tube (12) et le fil de traction (18) sont conducteurs, les effecteurs terminaux (60, 62) sont conducteurs et partiellement couverts d'un matériau isolant. Les deux effecteurs terminaux (60, 62) sont de préférence constitués d'un alliage de fonderie recouvert de PTFE et sont couplés de manière rotative l'un avec l'autre à l'aide d'une rondelle de raccordement (69, 71) en céramique isolante.
Giurtino Joel F.
Nunez George
Smart & Biggar
Symbiosis Corporation
LandOfFree
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