| 主权项 |
1. An anchoring cannula comprising:
a first cannula having a proximal end, a distal end, a longitudinal axis and a lumen extending from the proximal end to the oppositely disposed distal end along the longitudinal axis, the first cannula including a slot defining an upper limit and a lower limit, and a second cannula concentrically arranged within the lumen of the first cannula, the second cannula having a proximal end, a distal end, a lumen extending from the proximal end to the oppositely disposed distal end along the longitudinal axis and a monolithically formed expandable portion connected to the distal end that is configured to expand when the second cannula is advanced out of the distal end of the first cannula and to return to an unexpanded configuration when retracted back into the distal end of the first cannula. |
