Surgical knife

Details Surgical knife Surgical knife

1982-04-07

1984-09-25

Yasko, John D.

Surgery

Truss

Pad

30320, A61B 1704

Patent

active

044730764

ABSTRACT:
A surgical knife includes a blade secured to the knife body and having a cutting edge projecting transversely beyond the body profile. A slotted ski member is movable axially relative to the cutting edge to selectively expose the cutting edge by means of plural thread segments which cooperate to convert rotary motion to said axially controlled axial motion. The position of the ski and blade beyond the body profile enhances visibility of the incision. In the preferred embodiment, the ski is part of a shaft which is threadedly received in a spindle, which, in turn, is threadedly received in the same sense within the knife body. The ski shaft is procluded from rotary motion relative to the knife body and its threads have a greater pitch than the body threads; consequently, axial displacement of the spindle in one direction produces axial displacement of the ski in the opposite direction. The blade and blade holder, which remain stationary relative to the body, may be disposable so that the ski and ski translating mechanism can be re-used as desired. Alternatively, the entire knife assembly may be disposable.

REFERENCES:
patent: 1195169 (1916-08-01), Adcock
patent: 2473968 (1949-06-01), Paton
patent: 2941511 (1960-06-01), Cieremans
patent: 3945117 (1976-03-01), Beaver
patent: 3967377 (1976-07-01), Wells
patent: 4027295 (1977-05-01), Lieberman
"A Micrometer Knife", Albrecht, Transactions AAOO, Mar., Apr., 1972.

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