Patent ID: 9161839
Filing Date: 2015-10-20
Classification: A61B,A61F

Abstract:
1. A telescoping access cannula comprising: an outer tube having a proximal end, a distal end, and a lumen extending therebetween; an inner tube having a proximal end, a distal end, and a lumen extending therebetween, the inner tube being coaxially mounted to the interior of the outer tube by a screw thread so as to be longitudinally movable relative to the outer tube, with the proximal end of the inner tube being disposed within the interior of the outer tube; and a tubular rotatable member having a proximal end, a distal end, and a lumen extending therebetween, the tubular rotatable member being coaxially mounted to the interior of the outer tube such that the tubular rotatable member is rotatable relative to the outer tube but is prevented from longitudinal movement relative to the outer tube, and the tubular rotatable member being connected to the inner tube, wherein rotation of the tubular rotatable member relative to the outer tube causes corresponding rotation of the inner tube relative to the outer tube and results in longitudinal movement of the inner tube relative to the outer tube.