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Nasal reaction to changes in whole body temperature
G R Lundqvist1, O F Pedersen, O Hilberg
1Institute of Environmental and Occupational Medicine, University of Aarhus, Denmark.
Acta Oto-Laryngologica
|November 1, 1993
Summary
Body temperature significantly impacts nasal airway patency. Cooling causes nasal mucosal swelling, while heating leads to shrinkage, affecting breathing comfort.
Area of Science:
- Environmental Physiology
- Respiratory Medicine
- Thermoregulation
Background:
- Nasal patency is crucial for respiratory function and thermoregulation.
- Environmental temperature changes can influence physiological responses, including nasal mucosal status.
Purpose of the Study:
- To investigate the effects of whole-body temperature changes on nasal patency.
- To determine the role of inhaled air temperature in modulating nasal responses to thermal challenges.
Main Methods:
- Eight healthy young males participated in a cross-over study.
- Participants underwent immersion in cold (15°C) and warm (40°C) baths.
- Nasal cavity volumes were measured using acoustic rhinometry to assess mucosal changes.
Main Results:
- A decrease in body temperature induced nasal mucosal swelling (decreased nasal volume).
- An increase in body temperature caused significant nasal mucosal shrinkage (increased nasal volume).
- Inhaled air temperature modulated these nasal responses, sometimes reversing the effect.
Conclusions:
- Whole-body thermal balance is the primary determinant of nasal mucosal changes.
- Nasal cycle variations influenced the magnitude of nasal cavity volume changes.
- These findings highlight the nose's sensitivity to thermal stress and its role in respiration.