Hand-held surgical instruments with omni-circumferential...

A - Human Necessities – 61 – B

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Details

A61B 17/00 (2006.01) A61B 17/28 (2006.01) A61B 17/29 (2006.01) A61F 9/007 (2006.01)

Patent

CA 2413297

Hand-held instruments have an actuator assembly which may be employed to actuate a distally mounted tool by application of radial force about the entirety of the instrument circumference (i.e., is omni-actuatable). Most preferably, the actuator assembly (10-1) includes a plurality of circumferentially spaced-apart generally L-shaped actuator levers (20) defining respective arcuate bearing surfaces (22-1) along exterior edge regions thereof, and a retaining ring (22) which circumferentially bounds the actuator levers around the exterior edge regions thereof. The retaining ring most preferably defines an interior stationary arcuate guide surface (20-3) in conformable mated relationship to the bearing surfaces (22-1) of said actuator levers. Radial force applied to the proximally extending arm sections of the levers thereby responsively causes the bearing surfaces thereof to be slideably moved along the guide surface of said retaining ring so as to translate such radial force into longitudinal movements of an elongate actuation pin (18) between retracted and extended positions thereof. By providing a tool which operatively coacts with the actuation pin, a surgeon may actuate the tool as needed by applying radial force at any point about the circumference of the actuator assembly.

L'invention concerne des instruments manuels comprenant un dispositif d'actionnement utilisé pour actionner un outil monté distalement par application d'une force radiale sur la globalité de la circonférence dudit instrument (par exemple, omni-actionnable). De préférence, le dispositif d'actionnement (10-1) comporte une pluralité de leviers d'actionneur en forme de L généralement espacés circonférentiellement (20) qui forment des surfaces de support arquées respectives (22-1) le long des zones correspondantes de bords extérieurs, et un anneau de rétention (22) liant circonférentiellement lesdits leviers autour des zones correspondantes de bords extérieurs. Cet anneau de rétention constitue, de préférence, une surface guide arquée stationnaire interne (20-3) accouplée de manière adaptable aux surfaces de support (22-1) desdits leviers. La force radiale appliquée aux sections de bras s'étendant dans le sens proximal desdits leviers entraîne le déplacement coulissant des surfaces de support le long de la surface guide dudit anneau de rétention. Ainsi, une telle force radiale peut être translatée en mouvements longitudinaux d'une broche d'actionnement allongée (18) entre des positions rétractées et dilatées correspondantes. En utilisant un outil co-agissant avec la broche d'actionnement, un chirurgien peut actionner ledit outil, comme cela est nécessaire, en appliquant une force radiale à n'importe quel endroit autour de la circonférence du dispositif d'actionnement.

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