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Human nasal mucosal function at controlled temperatures

D F Proctor, I Andersen, G R Lundqvist

    Respiration Physiology
    |June 1, 1977
    PubMed
    Summary
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    Environmental temperature affects nasal mucus flow and airflow resistance in healthy adults. While changes were observed, they were of minor physiological significance across the studied temperature range.

    Area of Science:

    • Physiology
    • Environmental Health
    • Upper Airway Function

    Background:

    • The human upper airway plays a crucial role in conditioning inhaled air.
    • Nasal physiology is sensitive to environmental factors, including temperature and humidity.

    Purpose of the Study:

    • To investigate the effects of varying environmental temperatures on nasal physiological responses.
    • To quantify changes in nasal mucus flow, airflow resistance, and respiratory parameters.

    Main Methods:

    • 16 healthy volunteers were exposed to temperatures from 7°C to 39°C.
    • Measurements included nasal mucus flow, nasal airflow resistance, forced vital capacity, and body/nasal temperatures.
    • Nasopharyngeal end-inspiratory air temperature was also recorded.

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    Main Results:

    • Nasal mucus flow decreased moderately when temperatures deviated from 23°C.
    • Nasal airflow resistance decreased in warm air and increased in cold air.
    • No significant changes were found in forced vital capacity or rectal temperature.

    Conclusions:

    • Inhaled air temperature influences nasal mucus flow and airflow resistance.
    • These physiological changes were of minor significance within the tested environmental temperature range (32°C).