Patent ID: 7988618

Claim:
A medical procedure via a natural opening, for treating a target site located on an inside of a wall of a hollow organ of a patient, the medical procedure comprising: disposing a target on an external body surface located directly behind the wall of the hollow organ with respect to the target site such that the wall of the hollow organ is sandwiched between the target and the target site; introducing an insertion portion of an endoscope into the hollow organ via a natural opening of the patient's body; introducing a guide member and an instrument whose distal end is provided with the guide member into said hollow organ through a channel of the insertion portion of the endoscope previously introduced into the hollow organ; bringing the guide member of the instrument towards the target site by using a magnetic force acting between said target and said guide member; sandwiching the wall of the hollow organ and the target site between the target and the guide member; guiding the insertion portion of the endoscope along the instrument so that a distal end of the insertion portion approaches the target site; acknowledging the target site using an observation device disposed on a distal end of said insertion portion of said endoscope; and carrying out a procedure at the target site while observing the target site using said observation device.