Surgery – Instruments – Corneal cutter or guide for corneal cutter
Patent
1996-07-30
1999-01-19
Dawson, Glenn K.
Surgery
Instruments
Corneal cutter or guide for corneal cutter
167107, A61F 0900, A61B 1732
Patent
active
058609946
ABSTRACT:
A remotely operable intraocular surgical instrument specially adapted to perform anterior capsulectomy/capsulorhexis for extracapsular cataract extractions and emulsifications is disclosed. The intraocular instrument has a main body portion including at least two internally defined passageways and a rounded internal chamber including a rotatable wheel or a gear. An arm of variable length including a knife is associated with the rotatable wheel or gear such that movement of the wheel/gear rotates the knife through 360 degrees. In one embodiment, the wheel is driven through the use of a fluid forced through the internal passageways and around the wheel. In another embodiment a shaft having specialized teeth communicates pressure applied to a handle to the gear, thus turning the associated knife. Both embodiments include a releasable stop to prevent the knife from rotating and cutting past 360 degrees. Both embodiments also include structure for providing a viscoelastic solution to the operative field and an optional passageway to remove undesired material from the operative field. The lack of movement of the main body portion of the instrument during the procedure, simplicity of design, relative low expense of manufacture and disposable nature of the instrument provide obvious advantages and benefits.
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Dawson Glenn K.
Gray, Esq. J. Kevin
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