Patent ID: 9345513
Filing Date: 2016-05-24
CPC Classification: A61B

Claim Text:
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; 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 an expandable portion connected to the distal end, the expandable portion being 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; an actuator attached to the proximal end of the second cannula, the actuator being adapted to advance the second cannula along the longitudinal axis toward the distal end of the first cannula, thereby defining a distal direction, and to retract the second cannula along the longitudinal axis toward the proximal end of the first cannula, thereby defining a proximal direction; and a locking mechanism having a first portion defined in the first cannula and a second portion defined in the second cannula, the locking mechanism having at least a first position and a second position, the first position being configured to allow advancement of the second cannula in the distal direction and to allow retraction of the second cannula in the proximal direction, the second position being configured to prevent retraction of the second cannula in the proximal direction.