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Sutureless corneal transplantation method
| Details |
Inventors: Rowsey, J. James; Collins, Joseph Patrick;
Assignee: The University of South Florida (Tampa, FL)
Primary Examiner: Thaler; Michael H.
Assistant Examiner:
Attorney, Agent or Firm: Stein, Schifino & Van Der Wall
A method of repairing a cornea of an eye. A donor material of living tissue in the shape of a partial sphere having an exterior Bowman's membrane of living tissue, is first die cut to define an outline configuration including a central extent and a plurality of tabs extending outwardly therefrom. The tabs are then shaved to remove substantially all of the donor material therefrom leaving substantially only the Bowman's membrane. The eye to be repaired is then punched to form a central aperture in the cornea having a size and shape essentially that of the central extent of the donor material. A plurality of pockets are incised from the central aperture into the cornea, the pockets being positioned and sized and shaped to receive the respective shaven tabs when the central extent is positioned within the central aperture. The central extent is then positioned within the central aperture and the shaven tabs are imbricated into the respective pockets |
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DETAILED DESCRIPTION For the purpose of summarizing the invention, the invention comprises an eye with a cornea repaired with minimal or no sutures including, in combination, a donor material and a recipient eye.
The donor material is in the shape of a partial sphere and is cut in a generally circular central extent, the central extent being of the size and shape of the central portion of a cornea of an eye, the central extent having a periphery of a fixed diameter of between about 7.
0 and 7.
5 millimeters with an exterior surface in a convex configuration and an interior surface in a concave configuration and with an essentially common thickness throughout, the central extent having four to sixteen, preferably six, symmetrically positioned corneal tabs, preferably diamond-shaped, extending radially from the periphery of the central extent, the tabs having exterior surfaces as a continuation of the exterior surface of the central extent, and the exterior surfaces of the central extent and the tabs being of a common Bowman's membrane of about 100 microns thickness.
Preferably, the tabs have a thickness of about 10 percent of the thickness of the central extent with the area of juncture between the tabs and the central extent constituting between about 10 percent and 100 percent (i.
e.
, one continuous tab) of the circumference of the central extent, with the radial dimension of each tab being between about 25 and 75 percent of the diameter of the central extent, with the side edges of the tabs being radii of the central extent, and with the radially exterior edge of each tab being curved concentric with the curvature of the central extent.
The recipient eye is in the shape of a partial sphere having a circular aperture in the cornea at its central portion, the circular aperture being of a size and shape essentially that of the periphery of the central extent of the donor material, the aperture being of a common thickness at the periphery of the aperture, the central portion having four to sixteen, preferably six, symmetrically positioned pockets, with the pockets being at the area adjacent to the periphery of the aperture and constituting between about 10 percent and 100 percent (i
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Heart Surgery 
