| 摘要 |
One embodiment is directed to a system for providing surgical access across a wall of a tissue structure, comprising: a delivery member having proximal and distal ends; a first helical member having proximal and distal ends and a helical shape, the proximal end coupled to the delivery member distal end, the distal end extending distally of the delivery member distal end; an anchor member removably coupled to the helical member distal end; a suture member coupled distally to a portion of the anchor member and extending proximally to a position wherein at least a portion of it may be freely manipulated by an operator; and a tissue interface indentor member coupled to the delivery member and operatively coupled to the first helical member, the tissue interface indentor member comprising a distally protruding shape feature configured to contact one or more portions of the tissue structure adjacent to the distal end of the helical member and change an available angle of penetration between such portions and the distal tip of the first helical member as the distal tip is inserted into the tissue structure; wherein upon rotation of the delivery member in a first direction, the indentor member is urged against the tissue structure and the first helical member and coupled anchor member are advanced across at least a portion of the wall of the tissue structure, pulling along the distal portion of the suture member in a deployed suture pattern which remains coupled to the anchor member. |
