Scalpel with rotary depth guard

Details Scalpel with rotary depth guard Scalpel with rotary depth guard

1995-03-23

1996-10-29

Buiz, Michael Powell

Surgery

Instruments

Cutting, puncturing or piercing

30319, B26B 2500, A61B 1732

Patent

active

055692850

ABSTRACT:
A scalpel includes a circular blade rotatably attached to one end of a handle. A circular depth guard having a diameter smaller than that of the blade is rigidly and coaxially connected thereto. The depth guard includes tractional knurls arranged around a rim thereof. Pressing the blade into a piece of tissue causes penetration thereinto until the depth guard engages the tissue. Pulling the scalpel along the tissue causes the depth guard to roll along thereon and rotate the blade, which makes a cut with a rolling motion that minimizes tissue adhesion and dragging for a smooth and even incision. The depth guard ensures that the blade cuts at a precisely known and perfectly even depth. The tractional knurls ensure reliable rotation of the depth guard and the blade even on wet and slippery tissue. In a second embodiment, a rotary depth guard is attached to a fixed blade. In both a third and a fourth embodiment, a circular rotary blade and a circular rotary depth guard are eccentrically mounted. When the depth guard is rolled along tissue, meshing gears rotate the blade at a high speed for a smooth incision.

REFERENCES:
patent: 630094 (1899-08-01), Noble
patent: 756213 (1904-04-01), Connell, Sr.
patent: 1080038 (1913-12-01), Youngberg
patent: 1574819 (1926-03-01), Jezler
patent: 4077124 (1978-03-01), Christmann
patent: 4301594 (1981-11-01), Okada
patent: 4601103 (1986-07-01), Sugiyama
patent: 4791928 (1988-12-01), Berke et al.
patent: 4887598 (1989-12-01), Berke
patent: 5085663 (1992-02-01), Tarr
patent: 5101564 (1992-04-01), Melter
patent: 5342377 (1994-08-01), Lazerson
Article on Rotatable Knife by Peter Michalos, MD, on p. 42 of Jun. 15, 1994 issue of Ocular Surgery News.

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