Patent ID: 8002695

Claim:
A medical procedure for detecting a target site for forming an opening which communicates between an abdominal cavity and a hollow organ using an image of the site which is captured by an observation device inserted into a body via a natural opening, the medical procedure comprising the successive steps of: adjusting a position of a patient's body so that an anterior wall containing the target site of an inner cavity faces opposite to a direction of gravitational force; introducing the observation device into the patient's body; flowing liquid into the inner cavity so as to form a gas retaining area consisting of gas remaining in the inner cavity and a liquid holding area consisting of the introduced liquid held in the inner cavity; detecting the target site for forming the opening which communicates between the abdominal cavity and the hollow organ on an anterior wall of the inner cavity which is in contact with the gas retaining area based on a positional relationship between the gas retaining area and the liquid holding area, in which an image of the positional relationship is captured and displayed on a screen of the observation device when the position of the patient's body is in the position; and forming the opening which communicates between the abdominal cavity and the hollow organ.