Interest and limitations of the respiratory acoustical impedance

Christian Depeursinge*, Florence Depeursinge, Francois Feihl, Claude Perret

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The dynamic relationship between pressure and air flow at the mouth is usually described by the frequency dependence of the respiratory acoustical impedance (RAI). The RAI can be measured up to several hundred hertz by the use of forced excitation techniques. The RAI critically depends on the simplifications made in the characterization of the response of the respiratory system. In particular, the limitation of the frequency interval brings about a loss of information. Nonlinearities and nonstationarities are factors limiting the significance of the RAI. Another source of errors and variability for the RAI is the presence of the upper airway shunt. Technical and conceptual improvements in the measurements of the RAI in connection with clinical studies of asthma and vascular congestion are presented.

Original languageEnglish (US)
Title of host publicationIEEE/Engineering in Medicine and Biology Society Annual Conference
PublisherPubl by IEEE
Pages696-697
Number of pages2
Volume10
Editionpt2
StatePublished - Nov 1988
Externally publishedYes
EventProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society - New Orleans, LA, USA
Duration: Nov 4 1988Nov 7 1988

Other

OtherProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CityNew Orleans, LA, USA
Period11/4/8811/7/88

ASJC Scopus subject areas

  • Engineering(all)

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