Transcatheter valve prosthesis

摘要

A system for implanting a heart valve includes a radially self-expandable tubular body having a preformed groove disposed at an outer surface of the tubular body, and a valve disposed within the tubular body. The preformed groove extends at least partially around the tubular body, and has a circumferential opening facing radially outward. A trapping member is configured to be disposed within the preformed groove on the outer surface of the tubular body and form at least a partial loop around the tubular body. The circumferential opening of the preformed groove is relatively larger when an outflow end of the tubular body has been deployed from a catheter and an inflow end of the tubular body is disposed within the catheter, and the circumferential opening of the preformed groove is relatively smaller when both the outflow end and the inflow end are fully deployed from the catheter.

主权项

1. A system for implanting a heart valve, comprising:
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 extending at least partially around the tubular body and having a circumferential opening facing radially outward of the tubular body; a valve disposed within and attached to the tubular body; and a trapping member configured to be disposed within the preformed groove on the outer surface of the tubular body, the trapping member configured to form at least a partial loop around the tubular body, wherein (i) the circumferential opening of the preformed groove is in a first state when the outflow end of the tubular body has been deployed from a catheter and the inflow end of the tubular body is disposed within the catheter, (ii) the circumferential opening of the preformed groove is in a second state when both the outflow end and the inflow end are fully deployed from the catheter, the circumferential opening of the second state being relatively smaller that the circumferential opening of the first state, and (iii) a cross-sectional dimension of the trapping member is smaller than the circumferential opening of the first state and larger than the circumferential opening of the second state.