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[Subjective and objectifying olfactometry by means of flow-olfactometer].

H Gudziol1, B Wajnert

  • 1Klinikum der Friedrich-Schiller-Universität, Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde. hilmar.gudziol@med.uni-jena.de

Laryngo- Rhino- Otologie
|April 6, 2006
PubMed
Summary

The Kobal flow-olfactometer effectively screens olfactory function using subjective reports and objective breathing pattern changes. This method accurately estimates olfactory detection thresholds for various odorants.

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Area of Science:

  • Otorhinolaryngology
  • Neuroscience
  • Sensory Science

Background:

  • Assessing olfactory function is crucial for diagnosing smell disorders.
  • The OM2S flow-olfactometer's utility for subjective and objective olfactory screening requires evaluation.
  • Its application beyond chemosensory evoked potentials needs investigation.

Purpose of the Study:

  • To determine the suitability of the OM2S flow-olfactometer for olfactory screening.
  • To evaluate its capability for both subjective and objective olfactory assessment.
  • To explore its use in conjunction with chemosensory evoked potentials.

Main Methods:

  • Fifty-three individuals with normal olfaction (normosmics) were exposed to hydrogen sulfide (H2S) and phenylethyl alcohol (PEA) stimuli.

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  • Participants reported olfactory perception by pressing a button.
  • Respiratory nasal pressure changes were recorded, and breathing pattern alterations were analyzed using custom software.

    • Main Results:

    • Detection rates ranged from 79% to 98%, varying with odor quality and concentration.
    • Hydrogen sulfide (H2S) stimuli were detected more frequently than phenylethyl alcohol (PEA) stimuli.
    • A significant portion of subjects (64%) detected weak H2S and exhibited synchronous breathing pattern changes.

    Conclusions:

    • The Kobal flow-olfactometer is highly suitable for subjective olfactory testing.
    • Objective olfactory assessment via respiration changes is feasible with this device.
    • It provides a reliable method for estimating H2S detection thresholds.