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； and 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； wherein upon rotation of the delivery member in a first direction, 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, the deployed suture pattern being characterized in that it is substantially helical and represents a number of helical loops encapsulated by the wall of the tissue structure that is greater than about one helical loop, and is less than about three helical loops.
