Surgery – Instruments – Cutting – puncturing or piercing
Patent
1992-02-20
1993-04-13
Rosenbaum, C. Fred
Surgery
Instruments
Cutting, puncturing or piercing
606166, 30353, A61B 1732
Patent
active
052017478
ABSTRACT:
An improved surgical knife blade particularly suited to eye surgery having a triple edged truncated point. An elongated, flat diamond blade has a primal end adapted to be supported in a handle or the like and a sharp distal end adapted to penetrate and cut tissue, such as the cornea of the eye in radial keratotomy. The blade has a first edge lying generally parallel to the blade axis and a second edge at the distal blade end converging toward the first edge at a selected angle, optimally about 15.degree.. A flat transverse tip is provided at the meeting point of the first and second edges, at an angle of from about 45.degree. to 135.degree. to the first blade edge. Both edges and the tip are faceted to provide uniformly very sharp edges. This blade will penetrate tissue more easily and under greater control than prior blades so that arcuate transverse incisions may be accurately made in astigmatic keratotomy. Incisions of uniform depth to nearly the ends of the incisions can be made more accurately.
REFERENCES:
patent: 1778773 (1930-10-01), Reynolds
patent: 2102930 (1937-12-01), Wharton
patent: 4592113 (1986-06-01), Selfors
Gilliam Frank D.
Lewis William W.
Rosenbaum C. Fred
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