Patent ID: 8727996

Claim:
A delivery device for implanting a medical device that includes at least one fixation member adapted to fix the position of the medical device within a lumen of a human body, the fixation member being expandable from a low profile configuration in which it can be passed into the lumen to an expanded configuration in which it engages a wall of the lumen to maintain the medical device in place, the delivery device comprising: a tubular outer shaft; an inner shaft rotatably disposed in the outer shaft; and at least one retention member having a free end, the retention member being secured to and rotatable with the inner shaft, each retention member being associated with an exit aperture formed in the outer shaft to enable a retainer portion of the retention member, that includes its free end, to protrude outwardly through its associated exit aperture, the retainer portion of the retention member being adapted to extend circumferentially about at least part of the exterior of the outer shaft, the retainer portion of the retention member being retractable into the outer shaft in response to rotation of the inner shaft; whereby the fixation member of the medical device may be retained on the tubular shaft in its low profile configuration by the outwardly protruding retainer portion and may be released to expand to its expanded configuration upon retraction of the retainer portion in response to rotation of the inner shaft.