PROBLEM TO BE SOLVED: To provide a medical device that can be directly connected to an external device to which power is supplied from an external commercial power supply and can transmit/receive data directly to/from the external device while maintaining insulation between itself and the external commercial power supply.SOLUTION: A medical device that can be driven by power supply from an external commercial power supply includes: a first circuit which is connected to the external commercial power supply and is not insulated from the external commercial power supply； a second circuit which is supplied with power from the first circuit and is insulated from the first circuit； a first control part provided in the second circuit for controlling an operation of the medical device with the power supply from the first circuit； a third circuit which is insulated from the first circuit and is insulated from the second circuit through an isolation part； a connection part provided in the third circuit, which is connected to at least one external device； and a second control part provided in the third circuit for controlling an operation of the external device connected to the connection part with the power supply from outside the third circuit.SELECTED DRAWING: Figure 1【課題】外部商用電源との間の絶縁を維持したままで、外部商用電源から電源供給される外部デバイスとの直接接続が可能になり、その外部デバイスとの間で直接のデータの送受が可能になる医療装置を提供する。【解決手段】外部商用電源からの電源供給により駆動可能な医療装置は、外部商用電源と接続され、外部商用電源と絶縁されていない第１回路と、第１回路から電源供給され、第１回路と絶縁されている第２回路と、第２回路内に設けられ、第１回路からの電源供給により医療装置の動作を制御する第１制御部と、第１回路と絶縁されていると共に第２回路とアイソレーション部を介して絶縁されている第３回路と、第３回路内に設けられ、少なくとも１つの外部デバイスと接続される接続部と、第３回路内に設けられ、第３回路外からの電源供給により、接続部に接続された外部デバイスの動作を制御する第２制御部と、を備える。【選択図】図１
