An apparatus for ligating a medical protrusion comprises a ligating suture having a proximal end and a distal end configured to circumscribe the medical protrusion, and a one-way lock positioned there between. The apparatus further comprises an endoscope, a cutter blade configured to cut the suture, and a device for ligating a medical protrusion. The device comprises a tubular body having a proximal end and a distal end, a handle positioned at the proximal end, an endoscope controller operably connectable to the endoscope, a cutting controller operably connectable to the cutter blade, a suture controller configured to be operatively coupled with the suture, a curved bridge positioned at the distal end, the bridge having a proximal end and a distal end, and an armature, having a proximal end and a distal end, configured to releaseably retain at least a portion of the suture.