Circuit and method for measuring PSA output and energy

Details Circuit and method for measuring PSA output and energy Circuit and method for measuring PSA output and energy

1981-06-15

1982-12-21

Millin, V.

Surgery

Truss

Pad

A61N 136

Patent

active

043643965

ABSTRACT:
Apparatus and method for accurately measuring the energy output of a pacing system analyzer or other pulse generator. Voltage measurements are made across the output capacitor before and after the pulse is generated. These voltages are measured by a microprocessor using an analog-to-digital converter and various gating and control circuitry. By using a known value of capacitance for the output capacitor along with the voltages measured before and after the stimulation pulse is generated, the microprocessor can calculate the total amount of energy within the stimulation pulse. This value is displayed on an integral display device. Through the use of additional circuitry, measurements may be made for both atrial and ventricular stimulation pulses in a dual chamber stimulation device. Provisions have also been made for measuring the output energy for constant voltage pulse generators. This technique employs measurement of pulse width.

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Sum et al., "Digital Cardiac Defibrillator Tester", Med. and Biol. Eng. and Comput., 1979, vol. 17, pp. 710-714.
Jones et al., "Determining Transthoracic Impedance, Delivered Energy . . .", Medical Instrumentation, Nov.-Dec. '81, vol. 15, #6, pp. 380-382.

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