LATERALLY-EXPANDABLE ACCESS CANNULA FOR ACCESSING THE INTERIOR OF A HIP JOINT
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United States of America Patent
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Issued Date -
Dec 10, 2009
app pub date -
Feb 27, 2009
filing date -
Feb 29, 2008
priority date (Note) -
Abandoned
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Abstract
A laterally-expandable access cannula comprising: an elongated body have a distal end, a proximal end and a lumen extending between the distal end and the proximal end, the distal end of the access cannula comprising a plurality of fingers tapering inwardly as they extend distally, and the elongated body having an internal thread extending along at least a portion of the length of the lumen; and an inner sleeve disposed within the lumen of the elongated body, the inner sleeve having an external thread extending along at least a portion of its length, the external thread of the inner sleeve being in engagement with the internal thread of the elongated body, such that rotation of the inner sleeve causes the inner sleeve to move distally relative to the elongated body, whereby to cam open the plurality of fingers of the elongated body.
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