Surgery – Instruments – Corneal cutter or guide for corneal cutter
Patent
1996-01-16
1997-07-01
Dawson, Glenn
Surgery
Instruments
Corneal cutter or guide for corneal cutter
606167, A61B 1732
Patent
active
056432992
ABSTRACT:
Apparatus for supporting and guiding the movement of a high speed liquid jet for ophthalmic incisions includes a fixture for removably securing the device with respect to the apex of the cornea. The corneal apex extends through an opening in the fixture, and a concentric suction ring secures the fixture to the eyeball. A proximal portion of the fixture is provided with an internal cutout to permit resilient horizontal flexure of the proximal portion. A first linear actuator is arranged to drive the first flexible bracket to translate horizontally in precisely controlled motion. Joined orthogonally to the fixture is a second flexible bracket, having an internal cutout that permits resilient vertical flexure. One end of the second flexible bracket is secured rigidly to the fixture, and a micrometer actuator is joined to the movable end of the second flexible bracket to position it vertically in precisely controlled spacing. A high pressure liquid jet nozzle extends from the movable end of the second flexible bracket and is directed generally horizontally toward the corneal apex in the opening of the first bracket. A target receptacle is disposed in coaxial alignment with the liquid jet, and connected to a vacuum line to remove the liquid released in the liquid jet. An applanation member extends from a rigid portion of the first flexible bracket to impinge on the corneal apex. The vacuum line is secured to the movable end of the second flexible bracket to move in concert with the cutting jet.
REFERENCES:
patent: 5556406 (1996-09-01), Gordon et al.
Dawson Glenn
Sentinel Medical, Inc.
Zimmerman Harris
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