Patent ID: 7569027

Claim:
A gas supply apparatus comprising: a first fitting through which a gas of a first pressure is discharged; a second fitting through which a gas of a second pressure is discharged; a first tube having one end to which a first connector connectable to the first fitting is attached and supplying the gas of the first pressure to a first body cavity of a subject to be medically treated; a second tube having one end to which a second connector connectable to the second fitting is attached and supplying the gas of the second pressure to a second body cavity of the subject; a single gas source supplying a gas used for supply of the gas of the first and second pressures; a gas supply unit controlling the gas supplied from the gas source to provide both of the first and second fittings with both of the gases of the first and second pressures, respectively; a sensor detecting information indicative of a condition of the first connector connected to the first fitting and information indicative of a condition of the second connector connected to the second fitting; a determination unit determining whether or not the first connector is correctly connected to the first fitting, determining whether or not the second connector is correctly connected to the second fitting, determining whether or not the second connector is connected to the first fitting when determining that the first connector is not connected to the first fitting, and determining whether or not the first connector is connected to the second fitting when determining that the second connector is not connected to the second fitting, based on the information from the sensor; and a gas supply control unit controlling, based on a result determined by the determination unit, the gas supply unit to supply the gas of the first pressure and the gas of the second pressure; wherein when the determination unit determines that the first connector is correctly connected to the first fitting, the gas supply control unit controls the gas supply unit to supply the gas of the first pressure to the first fitting, when the determination unit determines that the second connector is correctly connected to the second fitting, the gas supply control unit controls the gas supply unit to supply the gas of the second pressure to the second fitting, when the determination unit determines that the second connector is connected to the first fitting, the gas supply control unit controls the gas supply unit to supply the gas of the second pressure to the first fitting, and when the determination unit determines that the first connector is connected to the second fitting, the gas supply control unit controls the gas supply unit to supply the gas of the first pressure to the second fitting.