Self-expanding device delivery apparatus with dual function bump
A self-expanding element delivery apparatus includes a catheter having an inner lumen, a self-expanding element, and a delivery wire disposed within and extending through the inner lumen and the self-expanding element. The self-expanding element has a proximal, distal, and an intermediate portion. The element has anchor members, a compressed configuration fitting within the inner lumen, and an expanded configuration dimensioned larger than the catheter. The delivery wire also has proximal and distal portions, an intermediate portion, a dual function bump member disposed approximate to the intermediate portion, and a pusher bump member disposed approximate to the proximal portion of the delivery wire. A bump member distance between the dual function bump member and the pusher bump member is such that so that only one of the dual function bump member and the pusher bump member can contact one of the anchor members.
1. A method of deploying a self-expanding element including a catheter with a delivery wire and the self-expanding element including distal and proximal anchor members thereon, the steps comprising:
disposing only a dual function bump member on the delivery wire between the proximal and distal anchors;
disposing a pusher bump member outside of the self expanding element proximal of the proximal anchor;
deploying the self-expanding element, comprising the steps of:
distally moving the delivery wire;
engaging the dual function bump member to the distal anchor member and the pusher bump member is unengaged to the proximal anchor member; and
engaging the pusher bump member to the proximal anchor member and disengaging the dual function bump member; and
recovering a partially deployed self-expanding element comprising the steps of:
proximally moving the delivery wire; and
engaging the dual function bump member to the proximal anchor member and disengaging the pusher bump member.
2. The method of claim 1 , further comprising the step of fully deploying the self-expanding element.