Patent ID: 8734381

Claim:
A gas supply system for supplying predetermined gas to a first body cavity of a patient through a first delivery member and to a second body cavity of the patient through a second delivery member, the gas supply system comprising: a pressure regulator coupled to the first and second delivery members and configured to regulate a pressure of the predetermined gas to a first pressure and a second pressure, the first pressure being suitable for the first body cavity, the second pressure being suitable for the second body cavity, the pressure regulator allowing the predetermined gas with its pressure regulated to be supplied to both the first and second delivery members; a first operation switch that switches, when operated by an operator, a first mode and a second mode, in the first mode, the gas supply system being configured such that the predetermined gas with its pressure regulated is only supplied to the first delivery member, in the second mode, the gas supply system being configured such that the predetermined gas with its pressure regulated is only supplied to the second delivery member; and a controller electrically connected to the pressure regulator and the first operation switch and operative to control the pressure regulator according to one of the first and second modes switched by the first operation switch.