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Comparative Study
. 1976 May-Jun;10(3):159-62.

The prediction of the impedance of the thorax to defibrillating current

L A Geddes, W A Tacker Jr, W Schoenlein, M Minton, S Grubbs, P Wilcox
  • PMID: 1272091
Comparative Study

The prediction of the impedance of the thorax to defibrillating current

L A Geddes et al. Med Instrum. 1976 May-Jun.

Abstract

In this paper a technique for predicting thoracic impedance to defibrillator pulses is described. The impedance to low-current (1.0 mA) high-frequency (10-500kHz) sinusoidal current is used as an indicator of the impedance of the thorax to high-current, damped sinusoidal waveform pulses. Results from 71 dogs to which defibrillator shocks of 4 to 220 A peak current were applied show that thoracic impedance can be predicted by this method. This information indicates that it is possible to design a defibrillator that can automatically measure chest impedance prior to a defibrillation shock and deliver a predetermined peak current to the subject.

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