Surgery – Instruments – Cutting – puncturing or piercing
Patent
1993-01-26
1994-02-01
Pellegrino, Stephen C.
Surgery
Instruments
Cutting, puncturing or piercing
606180, 604 22, A61B 1732
Patent
active
052828212
ABSTRACT:
An adjustable surgical instrument is provided in which adjustment of curvature may be provided during the surgical procedure while the instrument is within a body cavity. The adjustment of curvature may be made from no curvature, that is, straight, to ninety degrees or more. A surgical instrument is provided with an outer, intermediate and inner hollow member. The hollow intermediate member is mounted within the outer hollow member, and is provided with a preformed curvature, preferably in its distal region. The intermediate member is provided with a preformed curvature, preferably in its distal region, which curvature may be reduced or eliminated by longitudinally moving the outer hollow member over the curvature in the hollow intermediate member. The intermediate member has memory such that the initial curvature is recovered upon removal of the hollow outer member from the area of curvature of the intermediate hollow member. An inner member having flexibility at least in the area of curvature is provided with a cutting implement on its distal end. A drive is provided for displacing the hollow outer member with respect to the hollow intermediate member in a longitudinal direction.
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Lewis William
Pellegrino Stephen C.
Petock Michael F.
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