Detection of upper airway obstructions by spectral analysis of breathing signals

David Elad, Uri Zaretsky, Guy Soffer, Michael Wolf, Robert J. Shiner

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


The capability of time-frequency distributions (TFDs) to differentiate between open and obstructed airways was examined. Accordingly, a controlled in vitro study with an airway model and a preliminary in vivo study with healthy subjects and patients with airway diseases were conducted. The TFDs demonstrated the ability to discriminate between open and obstructed airways. A clear relation was found in the in vitro study between the high frequency content and: degree of obstruction; distance from measurement point; and intensity of breathing maneuver. The in vivo study revealed that a simple non-invasive measurement of breathing signals with a moderate respiratory effort contains important spectral information.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Number of pages2
ISBN (Print)0791816117
StatePublished - 1999
Event1999 Bioengineering Conference - Big Sky, MT, USA
Duration: 16 Jun 199920 Jun 1999


Conference1999 Bioengineering Conference
CityBig Sky, MT, USA


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