Acoustic monitoring of lung sounds for the detection of one lung intubation

S. Tejman-Yarden, A. Zlotnik, L. Weizman, G. M. Gurman, J. Tabrikian

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

Abstract

Background: One lung intubation (OLI) is a major incident during endotracheal intubation. Monitoring methods used today have been found to be non specific and controversial regarding its early diagnosis. We have developed a new system which detects OLI based on electronic lung sounds analysis during artificial ventilation. Methods: 24 adult surgical patients schedualed for routine surgical procedures were included. Lung sound sampling was done during induction to anesthesia and tube positioning by four piezoelectric microphones attached to the patients' back. To achieve OLI, the endotracheal tube was inserted and advanced down the airway so that no left breath sounds were heard; the tube was then withdrawn stepwise until equal breath sounds could be heard. The final position of the tube was confirmed by fiberoptic bronchoscopy. The sampled lung sound were processed by an algorithm which assumes a MIMO (Multi Input Multi Output) system; in which a multi-dimensional auto-regresive (AR) model relates the input (lungs) and the output (recorded sounds). A detector for OLI was developed, based on a Generalized Likelihood Ratio Test, which was implemented under a coherent sources assumption. Results: Based on this new algorithm the probability of OLI detection is 95.2% with a probability of 4.8% false alarm. We can assume even higher values of detection, depending on the sensitivity wanted, taking in mind higher incidence of false alarms. Summary: We present a new device, already in prototype, which detects OLI in various clinical scenarios with a very high degree of accuracy.

Original languageEnglish
Title of host publicationITRE 2006 - 4th International Conference on Information Technology
Subtitle of host publicationResearch and Education, Proceedings
PublisherIEEE Computer Society
Pages186
Number of pages1
ISBN (Print)1424408598, 9781424408597
DOIs
StatePublished - 1 Jan 2006
EventITRE 2006 - 4th International Conference on Information Technology: Research and Education - Tel-Aviv, Israel
Duration: 17 Oct 200618 Oct 2006

Publication series

NameITRE 2006 - 4th International Conference on Information Technology: Research and Education, Proceedings

Conference

ConferenceITRE 2006 - 4th International Conference on Information Technology: Research and Education
Country/TerritoryIsrael
CityTel-Aviv
Period17/10/0618/10/06

ASJC Scopus subject areas

  • Computer Science (all)
  • Information Systems
  • Information Systems and Management

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