Electrotherapy method and apparatus for external defibrillation

CAFC
  • US 5,803,927 A
  • Filed: 02/19/1997
  • Issued: 09/08/1998
  • Est. Priority Date: 08/06/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for operating an external defibrillator comprising:

  • discharging an energy source across electrodes in electrical contact with the exterior of a patient in a truncated exponential biphasic waveform;

    monitoring a patient-dependent electrical parameter during the discharging step; and

    controlling duration of the truncated exponential biphasic waveform based on a value of the electrical parameter to be approximately 20.3 mS or less for all values of the electrical parameter.

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