MEDICAL IMPLANT DELIVERY SYSTEM

The present invention relates to an implant delivery system comprising a sheath member (101) having a distal end (116), a proximal end (114), and a central longitudinal axis (112), the sheath member defining a lumen (117) along the central longitudinal axis, an implant delivery shaft (103) having a distal end (122) and a proximal end (121), the implant delivery shaft disposed at least partially within the sheath member, an implant spreader assembly (107) disposed at the distal end of the implant delivery shaft, a sheet-like implant (250) disposed on the implant spreader assembly in a folded configuration, and a cap (105) disposed at the distal end of the sheath member, the cap comprising a plurality of petals (161) and obstructing at least a portion of an opening into the lumen of the sheath member, wherein advancing the implant delivery shaft distally causes at least some of the plurality of petals to expand outward away from the central longitudinal axis, and to uncover the implant spreader assembly and the sheet-like implant from within the sheath member, wherein the configuration is such that when uncovered, the implant spreader assembly unfolds the sheet-like implant from the folded configuration to an unfolded configuration.