Side load tolerant instruments for use in laparoscopic surgery

Details Side load tolerant instruments for use in laparoscopic surgery Side load tolerant instruments for use in laparoscopic surgery

1995-05-31

1998-04-28

Peffley, Michael

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604264, 604280, 606167, A61M 2700

Patent

active

057438803

ABSTRACT:
A side-load tolerant instrument, comprising an outer part and an inner part, for use in laparoscopic procedures in a body cavity. The inner part is elongate and includes a housed portion, which is part of the length of the inner part. The outer part is elongate, houses the housed portion of the inner part, and permits the housed portion to move freely axially relative to it. The outer part bends lengthways when an external side load is applied to it. The outer part exerts an internal side load on the housed portion of the inner part to bend the housed portion lengthways to conform to the lengthways bending of the outer part. Side-load tolerance is provided by reducing the internal side load between outer part and the inner part resulting from the outer part bending lengthways in response to the external side load. The reduced internal side load reduces friction between the outer part and the inner part when the instrument is subject to the external side load. The inner part includes a lateral compliance device that reduces the internal side load required to bend the housed portion of the inner part to conform to lengthways bending of the outer part. Alternatively, the housed portion of the inner part may be shaped over at least part of its length to accommodate a laterally-displaced portion of the outer part that results from the lengthways bending of the outer part.

REFERENCES:
patent: 3833003 (1974-09-01), Taricco
patent: 4654030 (1987-03-01), Moll et al.
patent: 4863430 (1989-09-01), Klyce et al.
patent: 4976684 (1990-12-01), Broadnax, Jr.
patent: 5013292 (1991-05-01), Lemay
patent: 5215526 (1993-06-01), Deniega et al.

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