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Dysphagia

, Volume 14, Issue 4, pp 191–195 | Cite as

Validation and Characterization of the Computerized Laryngeal Analyzer (CLA) Technique

  • Christina  Danbolt
  • Peter  Hult
  • Lita Tibbling  Grahn
  • Per  Ask

Abstract.

The aim of this study was to investigate the response characteristics of the Computerized Laryngeal Analyzer (CLA) and the validity of the noninvasive CLA method to detect swallowing-induced laryngeal elevation correctly. Two healthy adults and two experimental models were used in the study. The CLA technique identified all swallowing events but was unable to discriminate between swallowing and other movements of the tongue or the neck. The computer program produced a derivated response to a square wave signal. Stepwise bending increments of the sensor displayed a linear amplitude response. The degree of laryngeal elevation could not be estimated with the CLA technique, and it was not possible to draw any reliable conclusions from the recordings as to whether the larynx was moving upward or downward.

Key words: Computer — Larynx — Noninvasive — Swallowing — Validity — Deglutition — Deglutition disorders. 

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Copyright information

© Springer-Verlag New York Inc. 1999

Authors and Affiliations

  • Christina  Danbolt
    • 1
  • Peter  Hult
    • 2
  • Lita Tibbling  Grahn
    • 1
  • Per  Ask
    • 2
  1. 1.Department of Oto-Rhino-Laryngology, University Hospital, Linköping, SwedenSE
  2. 2.Department of Biomedical Engineering, University Hospital, Linköping, SwedenSE

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