Expanding cannula and retractor device and methods of use
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United States of America Patent
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Jul 17, 2012
Grant Date -
Oct 28, 2010
app pub date -
Feb 24, 2010
filing date -
Feb 24, 2009
priority date (Note) -
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Abstract
Expanding cannula and retractor devices and methods of use are provided. An expanding cannula and retractor device includes a first tube, a second tube positioned within the first tube, and an expandable continuous membrane connecting distal portions of the first and second tubes. The membrane can expand into an annulus based on the movement of the second tube relative to the first tube in order to contact tissue and maintain the position of the device.
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