An improved forced oscillatory estimation of respiratory impedance

Bálint Daróczy, Zoltán Hantos

Research output: Contribution to journalArticle

52 Citations (Scopus)


A new scheme of estimation is proposed for the determination of the total respiratory impedance (Zr) by forced oscillations. Instead of estimating Zr from the airflow at the mouth and the pressure drop across the respiratory system, Zr can be estimated from cross-power spectra between the electrical signal of the driving apparatus and the measured pressure and flow signals. Since the electrical signal is free from any disturbance originating from spontaneous breathing, unlike the conventional techniques the proposed 'indirect' estimation of Zr is not subject to systematic errors caused by the respiratory signal components. This is confirmed both by theoretical analysis and simulation of the forced oscillatory measurement.

Original languageEnglish
Pages (from-to)221-235
Number of pages15
JournalInternational Journal of Bio-Medical Computing
Issue number3
Publication statusPublished - May 1982

ASJC Scopus subject areas

  • Medicine (miscellaneous)

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