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Testing olfaction in a clinical setting.

W S Cain

    Ear, Nose, & Throat Journal
    |April 1, 1989
    PubMed
    Summary
    This summary is machine-generated.

    Olfactory functioning tests assess smell and identify causes of olfactory loss. Scores range from 0 (anosmia) to 7 (normosmia), with performance declining after age 65.

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    Area of Science:

    • Olfactory neuroscience
    • Clinical sensory testing

    Background:

    • Olfactory dysfunction affects a significant portion of the population.
    • Age is a known factor influencing olfactory performance.
    • Distinguishing between anosmia and hyposmia is crucial for diagnosis.

    Purpose of the Study:

    • To detail the methodology for assessing olfactory functioning at the CCCRC.
    • To describe the scoring system for olfactory performance.
    • To analyze the impact of age and etiology on olfactory test results.

    Main Methods:

    • Utilized a two-part olfactory assessment: a threshold test and an odor identification test with eight common items.
    • Calculated a composite score ranging from 0 (anosmia) to 7 (normosmia) based on average performance.
    • Examined score distributions across different etiologic categories and age groups.

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    Main Results:

    • Normal olfactory function is stable until approximately age 65, after which it declines.
    • Half of patients with olfactory complaints present with anosmia, while the other half exhibit hyposmia.
    • Patients with nasal/sinus disease more frequently show anosmia compared to hyposmia.
    • Test performance can indicate the cause of olfactory loss and quantify treatment efficacy.

    Conclusions:

    • Olfactory testing provides a reliable measure of olfactory function and its severity.
    • The assessment can differentiate between various causes of smell impairment.
    • The results demonstrate the utility of these tests in guiding and evaluating treatment interventions for olfactory dysfunction.