A system (116, 120) for electrically limiting leakage current in a patient-connected medical device (100). The system (116, 120) includes a first set (116) of one or more switching devices (118) that selectively connect a first power output (124) of a battery compartment (110) of the patient-connected medical device (100) with a first power input (126) of electronic components (102) of the patient-connected medical device (100) based on a first polarity of input voltage from the battery compartment (110). The system (116, 120) further includes a second set (120) of one or more switching devices (122) that selectively connect a second power output (128) of the battery compartment (110) of the patient-connected medical device (100) with a second power input (130) of the electronic components (102) based on a second polarity of the input voltage, wherein the first polarity is opposite the second polarity.患者接続型医療機器１００における漏れ電流を電気的に制限するためのシステム１１６，１２０。システム１１６，１２０は患者接続型医療機器１００の電池コンパートメント１１０の第１の電源出力１２４を電池コンパートメント１１０からの入力電圧の第１の極性に基づいて患者接続型医療機器１００の電子部品１０２の第１の電源入力１２６と選択的に接続する一つ以上のスイッチング装置１１８の第１のセット１１６を含む。システム１１６，１２０は患者接続型医療機器１００の電池コンパートメント１１０の第２の電源出力１２８を入力電圧の第２の極性に基づいて電子部品１０２の第２の電源入力１３０と選択的に接続する一つ以上のスイッチング装置１２２の第２のセット１２０をさらに含み、第１の極性は第２の極性と反対である。
