Access cannula with hinge restrictor
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United States of America Patent
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Jun 12, 2012
Grant Date -
Dec 31, 2009
app pub date -
May 19, 2009
filing date -
Jun 25, 2008
priority date (Note) -
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Abstract
A cannula assembly adapted to facilitate the percutaneous introduction of surgical instrumentation. In particular, the cannula assembly includes a cannula housing and a cannula member incorporating an restrictor hinge. The restrictor hinge is configured and dimensioned to transition from a first, initial stage in which an initial internal dimension is defined, to a second, expanded stage, such that the proper orientation of any surgical instrument inserted into the cannula may be achieved and a substantially fluid-tight seal may be formed therewith.
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