| 摘要 |
A method and apparatus for performing self-tests on defibrillation and pacing circuits including a patient isolation switch is disclosed. Following a test of the defibrillation and pacing circuitry, the isolation switch is tested by closing certain switches within the defibrillation circuitry so as to create a circuit path, and then opening and closing the isolation switch. Alternative tests may be performed depending on whether the impedance at the output of the defibrillator is determined to be an open circuit or a short circuit. If the output is determined to be an open circuit, then the test monitors the voltage across the output of the defibrillator as indicated by the voltage of a DC offset of a preamplifier coupled to the output of the defibrillator. For the short circuit test, the voltage on the energy storage capacitor is monitored.
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