Methods and apparatus for delivering and positioning sheet-like materials in surgery

An implant delivery system for delivering a sheet-like implant, the implant delivery system comprising:

• a delivery shaft having a proximal end and a distal end defining a generally longitudinal direction;
• an implant retainer assembly proximate the distal end of the delivery shaft configured to releasably couple a sheet-like implant thereto for positioning the sheet-like implant at a treatment site;
• an implant spreader assembly proximate the distal end of the delivery shaft, the implant spreader assembly having a first arm and a second arm each having a proximal and a distal end with the proximal end of each arm pivotably connected proximate the distal end of the delivery shaft, the first and second arms moveable between a closed position and an open position wherein in the closed position the arms extend generally in the longitudinal direction and in pivoting to the open position the distal end of each arm moves in a generally transverse direction to spread an implant positioned on the implant retainer assembly;
• and,
• a guidewire port proximate the distal end of the delivery shaft for receiving a guidewire therethrough, wherein the guidewire port location is positioned in known relation to an implant when placed on the implant retainer assembly.