Surgical knife for controlled lengthening of an incision

Details Surgical knife for controlled lengthening of an incision Surgical knife for controlled lengthening of an incision

1995-07-31

1998-09-22

Thaler, Michael H.

Surgery

Instruments

Cutting, puncturing or piercing

606166, 606172, 30351, 30357, A61B 1732

Patent

active

058108572

ABSTRACT:
A surgical knife has a blade portion including a sharp edge disposed in a first plane and a dull portion offset from the first plane by a selected amount substantially equal to the amount of desired lengthening. When the blade is inserted into a previously-formed incision in tissue and moved in the direction of desired lengthening, the sharp edge cuts the tissue to lengthen the incision until the dull portion abuts against a wall of the incision to prevent further travel of the blade. The dull portion thus acts as a "stop" which prevents further travel of the blade beyond a desired point, enabling controlled lengthening of the incision.

REFERENCES:
patent: 3897629 (1975-08-01), Liedtke
patent: 4787146 (1988-11-01), Gaskins
patent: 5203865 (1993-04-01), Siepser
patent: 5222967 (1993-06-01), Casebeer et al.
patent: 5376099 (1994-12-01), Ellis et al.
Comparison of the Standard Combined (Bidirectional) Radial Keratotomy Technique With the Undercut Technique in Human Donor Eyes, Parks, et al., Journal of Refractive Surgery, vol. 12, Jan./Feb. 1996, pp. 77-84.
Coopervision Publication (2 pages) 1985.

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