Transcatheter valve prosthesis
A system for implanting a heart valve includes a radially self-expandable tubular body having an inflow end and an outflow end and a preformed groove disposed at an outer surface of the tubular body between the inflow end and the outflow end. The preformed groove extends at least partially around the tubular body, and has a circumferential opening facing radially outward of the tubular body. A valve is disposed within and attached to the tubular body, and a trapping member is configured to be moved into the preformed groove and form at least a partial loop around the preformed groove. An insertion member is configured to push the trapping member into the preformed groove. Additionally, a coupling member can provide a releasable attachment between the trapping member and the insertion member.
1. A method for implanting a replacement valve in a patient's heart, comprising:
deploying from a first delivery catheter a radially self-expandable tubular body having an inflow end and an outflow end, a valve disposed within a lumen of the tubular body, and a preformed groove disposed at an outer surface of the tubular body between the inflow end and the outflow end, the preformed groove extending at least partially around the tubular body and having a circumferential opening facing radially outward of the tubular body, such that, when the tubular body is deployed, the tubular body is aligned with a native valve;
deploying a trapping member releasably attached to an insertion member from a second delivery catheter;
moving the trapping member into the preformed groove such that the insertion member pushes the trapping member into the preformed groove and the trapping member forms at least a partial loop within the preformed groove; and
releasing the insertion member from the trapping member and removing the insertion member.
2. The method according to claim 1 , wherein moving the trapping member into the preformed groove includes pushing the trapping member between at least two projections on the tubular body.
3. The method according to claim 1 , further including:
advancing an elongate outer member around the native valve to form a loop around the native valve with the elongate outer member; and
advancing the trapping member over the elongate outer member.
4. The method according to claim 3 , wherein releasing the elongate outer member releases the trapping member from the insertion member.
5. The method according to claim 1 , further including:
re-attaching the insertion member and the trapping member after the step of releasing the insertion member from the trapping member;
re-positioning the trapping member within the patient; and
re-releasing the insertion member from the trapping member.
6. The method according to claim 1 , wherein the native valve is a mitral valve or a tricuspid valve.