Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1989-10-27
1991-09-10
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
128751, 606171, A61B 1720
Patent
active
050470086
ABSTRACT:
An improved vitrectomy probe for removing vitreous and other fibrous gel materials. A hollow cutting blade is reciprocated within a smooth bore hollow needle of the microsurgical vitrectomy probe across a cutting edge of the outer needle slicing the fibrous material of the vitreous. A pressurized fluid source, diaphragm and spring cooperate to provide for the reciprocation of the blade. A vacuum source removes vitreous material through the hollow needle. A reciprocating suction outlet tube attached to the hollow needle directs vitreous material into a vacuum fitting which is isolated from the motion of the reciprocating outlet tube. An adjustment screw limits the travel of the reciprocating blade as well as the size of the opening in the needle. A dissector head faciitates the separation of vitreous fibers and directs them into the needle opening.
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de Juan, Jr. Eugene
Gahn Gerald S.
Hickingbotham Dyson
Weidenbenner John J.
Pellegrino Stephen C.
Rafa Michael
Storz Instrument Company
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