Inventors:
Clifton W. Callaway - Pittsburgh PA
Lawrence D. Sherman - Aspinwall PA
Assignee:
The University of Pittsburgh - Pittsburgh PA
International Classification:
A61N 139
Abstract:
A defibrillator, which selectively delivers a defibrillation pulse to a patient, includes electrodes adapted for placement on the patient, a monitoring circuit for providing an electrocardiogram (ECG) of the patient, and a defibrillation pulse generator having an energy store for delivering a defibrillation pulse. A switch in electrical communication with the ECG monitoring circuit and the defibrillation pulse generator selectively electrically connects the monitoring circuit and the defibrillation pulse generator to the electrodes. A microprocessor is in electrical communication with the monitoring circuit, the defibrillation pulse generator, and the switch. The microprocessor causes the switch to electrically connect the monitoring circuit to the electrodes in order to provide the ECG of the patient. The microprocessor also determines a scaling exponent for the patient from the ECG thereof. The microprocessor further compares the scaling exponent to a predetermined value and selectively causes the switch to electrically connect the defibrillation pulse generator to the electrodes in order that the energy store delivers the defibrillation pulse to the patient.