Surgery – Truss – Pad
Patent
1983-12-30
1985-11-12
Pellergino, Stephen C.
Surgery
Truss
Pad
30293, A61B 1732, B26B 2900
Patent
active
045521468
ABSTRACT:
The present invention is an ophthalmic instrument for use in performing radial keratotomy on the cornea of a patient for correcting myopia and/or astigmatism of the patient. The ophthalmic instrument includes a surgical blade having a suitable width for making an incision into the cornea of the patient and an elongated handle which is formed out of a plastic material and to which the surgical blade is fixedly coupled. The ophthalmic instrument also includes a depth-guide which is a hollow, cylindrical member and which is formed out of a plastic material. The depth guide has a first and second end and also has a pair of protruding arms, each of which has a first end and a rounded second end and which extend parallel to each other and to the longitudinal axis of the hollow, cylindrical member from the first ends of the protruding arms for most of their length and then sharply converge adjacent, but not contiguous to the rounded second ends of the protruding arms the second ends of the protruding arms being spaced apart a distance slightly greater than the width of the surgical blade whereby the second rounded ends of the protruding arm slidably rests on the surface of the cornea in order to control the incision depth of the surgical blade, slidably coupled to the elongated handle. The depth-guide has it position on the elongated handle pre-set to a depth in the range of 0.20 millimeters to 1.2 millimeters.
REFERENCES:
patent: 3776230 (1973-12-01), Neefe
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patent: 4006746 (1977-02-01), Edwards
patent: 4026295 (1977-05-01), Lieberman
patent: 4180075 (1979-12-01), Marinoff
patent: 4205682 (1980-06-01), Crock et al.
patent: 4298004 (1981-11-01), Schachar
patent: 4340059 (1982-07-01), Marinoff
Allcroft Arthur N.
Jensen Ronald P.
Myocur, Inc.
Pellergino Stephen C.
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