Cutting apparatus for the cutting of a round corneal disc

Details Cutting apparatus for the cutting of a round corneal disc Cutting apparatus for the cutting of a round corneal disc

1990-01-16

1991-04-30

Thaler, Michael H.

Surgery

Instruments

Corneal cutter or guide for corneal cutter

A61B 1732

Patent

active

050114980

ABSTRACT:
Cutting apparatus for excision of a round corneal disc. The cutting apparatus includes a hollow cylindrical cutting knife known as a trepan. The cutting knife is held by an outer cylinder which has a connection plate on its end extending toward the cornea to be cut. Extending perpendicularly to the axis of the cylinder is a connection plate with a bore for the passage of the cutting knife. In the cylinder there is situated near its rear end a clip ring, within which the rear end of the cutting knife is held by a frictional fit. With the aid of a feed apparatus, the cutting knife is axially moveable with respect to the cylinder for the performance of the cutting movement. The cutting apparatus can be joined with its connection plate either by an artificial anterior chamber support or with a vacuum ring on the patient eye. In both cases, there is assured guiding of the cutting knife perpendicularly to a plane which traverses the base of the cornea. With such an apparatus, it is possible, first to obtain cuts running through the outer surface of the cornea running perpendicularly through the outer surface of the cornea and moreover to obtain corneal discs from a donor eye which are taken so as to correspond exactly with the corneal discs taken from the patients eye.

REFERENCES:
patent: 3058471 (1962-10-01), Shope
patent: 3074407 (1963-01-01), Moon et al.
patent: 4205682 (1980-06-01), Crock et al.
patent: 4236519 (1980-12-01), La Russa et al.
patent: 4429696 (1984-02-01), Hanna

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