Radial keratotomy knife and system using same

Details Radial keratotomy knife and system using same Radial keratotomy knife and system using same

A - Human Necessities

61

B

128/113

A61B 17/32 (2006.01) A61F 9/013 (2006.01)

Patent

CA 1281962

ABSTRACT OF THE DISCLOSURE A radial keratotomy knife which includes an accurate linear position transducer for digitally displaying the extension of a surgical blade beyond a foot pad on the knife. A system is also disclosed for zeroing the blade position relative to the foot pad. The system includes a zeroing sleeve having a reflective membrane to reflect light to a detector. The knife is inserted into the sleeve so that the foot pad is in contact with the membrane within the system contained within a console. When the blade is advanced to contact the reflective membrane from within the sleeve, the reflected light pattern is altered to establish accurately a zero position of the knife blade relative to the foot pad. The knife is then withdrawn from the sleeve and the blade advanced by a micrometer so that the transducer produces a signal relative to the reference level indicating the extension of the blade.

516998

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