Surgery – Miscellaneous – Methods
Patent
1994-11-10
1997-12-23
Sykes, Angela D.
Surgery
Miscellaneous
Methods
A61B 1700
Patent
active
056998104
ABSTRACT:
A surgical procedure and device are used to precisely remove soft tissue from the eye. For example, a corneal epithelial layer is removed from the eye as part of a photorefractive keratectomy (PRK) or phototherapeutic keratectomy (PTK) procedure. In the procedure, the epithelial layer is abraded, under irrigation, using a relatively soft and pliable rotating abrading surface. The device used to perform the procedure is a hand-held rotary brush having semi-rigid plastic bristles with flat polished ends. In another embodiment, a rotating abrading surface is provided by open cells of a sponge material, instead of a brush. In this manner, the epithelium can be abraded away within a few seconds in a precisely defined area without causing mechanical damage to the underlying stromal layer. In a further application, the tool is used to remove a so-called pseudo-membrane formed during laser ablation of the corneal stroma during PRK or PTK.
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Gilbert Samuel
Sykes Angela D.
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