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Related Experiment Videos

The nasal cycle in swine

W M Campbell, E B Kern

    Rhinology
    |September 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Domestic pigs show nasal cycles, with congestion and decongestion in their nasal passages. Unilateral sympathectomy temporarily increases nasal resistance, which later returns to normal levels.

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    Area of Science:

    • Veterinary Medicine
    • Physiology

    Background:

    • The nasal cycle, characterized by alternating congestion and decongestion of nasal mucous membranes, is well-documented in humans.
    • Understanding nasal physiology in domestic animals is crucial for respiratory health research.

    Purpose of the Study:

    • To investigate the existence and characteristics of the nasal cycle in domestic pigs.
    • To evaluate the acute and chronic effects of unilateral sympathectomy on nasal resistance in pigs.
    • To introduce a novel method for measuring nasal resistance changes in animal models.

    Main Methods:

    • Observation of nasal mucous membrane congestion and decongestion patterns in domestic pigs.
    • Surgical induction of unilateral sympathectomy followed by nasal resistance measurements.
    • Development and application of active anterior rhinomanometry for laboratory animals.

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    Main Results:

    • The nasal cycle was identified in 6 out of 11 domestic pigs studied.
    • Unilateral sympathectomy caused an acute increase in ipsilateral nasal resistance.
    • Nasal resistance returned to preoperative levels within several weeks post-sympathectomy.

    Conclusions:

    • Domestic pigs exhibit a physiological nasal cycle.
    • The autonomic nervous system plays a role in regulating nasal airflow and resistance in pigs.
    • Active anterior rhinomanometry is a viable technique for studying nasal resistance in animal models.