SYSTEM OF INSTRUMENTS FOR VITRECTOMY SURGERY COMPRISING SHARP TROCHAR, CANNULA AND CANULA VALVE CAP AND METHOD FOR ITS USE
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United States of America Patent
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Issued Date -
N/A
app pub date -
Jul 30, 2012
filing date -
Jul 19, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system of instruments is provided for vitrectomy surgery, comprising a sharp trochar, a cannula and a cannula valve cap. The sharp trochar provided also has applicability to other fields of surgery. The sharp trochar has a hollow-ground blade that reduces the force necessary for insertion and upon removal leaves a wound with improved healing characteristics. The trochar is selectably insertable in a cannula, and in a preferred embodiment the cannula and the trochar are adapted with mutually tapered exterior surfaces to as to define a smooth transition in diameter to further facilitate insertion. A sealing valve cap is also provided for the cannula, designed to provide sealing while reducing the force required in for inserting instruments into the cannula. A method for angled insertion of this assembly is also disclosed.
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