Surgical cannula
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United States of America Patent
Stats
-
Apr 7, 1987
Issued Date -
N/A
app pub date -
Apr 7, 1986
filing date -
Oct 24, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surgical cannula having a first seal member having a substantially conical shape and an opening at the tip thereof, and a second seal member having a substantially conical shape and a slit at the tip thereof, whereby (a) when an instrument is inserted into the cannula, the instrument can pass through the first and second seal members into proximity with a surgical site located beneath the cannula, and fluid entering the cannula from the site will force the first seal member to close around the instrument and form a tight seal therewith so as to prohibit fluid from passing out of the cannula and (b) when no instrument is inserted into the cannula, fluid entering the cannula from the site will force the conical second seal member to close tightly on its slit and thereby form a tight seal so as to prohibit fluid from passing out of the cannula.
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