Surgical fastener delivery and locking mechanism

A method for securing a medical prosthesis to tissue, the method comprising:

• delivering a fastener to a target tissue that has a prosthesis applied to it, using a device that includes:
• a handle including a trigger;
• a shaft extending from the handle and dimensioned for insertion into a patient's abdomen through an incision in the abdomen;
• a first insertion member and a second insertion member disposed within the shaft;
• and
• a fastener comprising a loop end held by the first insertion member and a hook end held by the second insertion member, wherein the first insertion member comprises a pair of prongs positioned together within a recess at the loop end of the fastener.

A method for securing a hernia mesh to tissue, the method comprising:

• inserting a distal portion of a shaft of a fastening device into a patient's abdominal cavity through an incision by holding a handle on a proximal end of the shaft to manipulate the fastening device;
• pressing a distal end of the shaft of the device against the hernia mesh;
• operating a trigger on the handle to deliver a fastener through the hernia mesh and into the tissue to secure the fastener in place, wherein the fastener comprises a loop end held by a first insertion member disposed within the shaft and a hook end held by a second insertion member disposed within the shaft, wherein the first insertion member comprises a pair of prongs positioned together within a recess at the loop end of the fastener;
• and
• removing the device from the patient's abdominal cavity.