Surgical knife

Details Surgical knife Surgical knife

2006-12-05

2006-12-05

Bui, Vy (Department: 3734)

Surgery

Instruments

Corneal cutter or guide for corneal cutter

C030S355000

Reexamination Certificate

active

07144403

ABSTRACT:
A knife having a blade tip configuration that reduces incisional force by providing a more efficient distribution of tissue piercing and cutting forces over the cutting edges. The distal tip of the blade has a profile in plan view in the region of approximately 150 microns from the distal most point of the tip that may be described by the equation w=adn, where w is the distance from the blade's longitudinal axis to the blade's cutting edge, a is a constant of proportionality not greater than 0.5 and d is the distance along the blade's longitudinal axis from the extreme distal point of the blade tip. The extreme distal point of the tip has a slightly rounded, rather than pointy, profile, with a tip radius of approximately 40 microns or less.

REFERENCES:
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patent: 5217477 (1993-06-01), Lager
patent: 5713915 (1998-02-01), Van Heugten et al.
patent: 6547802 (2003-04-01), Nallakrishnan et al.
patent: 6554840 (2003-04-01), Matsutani et al.
patent: 6613061 (2003-09-01), Olson et al.
patent: 2 130 955 (1984-06-01), None

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