[Warming inhaled air in the nose]

Area of Science:

• Nasal physiology
• Respiratory thermoregulation
• Upper airway function

Context:

• Understanding the nasal cavity's role in conditioning inhaled air is crucial for respiratory health.
• Previous research has focused on airflow dynamics, but less on thermal regulation during breathing cessation.

Purpose:

• To investigate if nasal mucosal temperature changes during a brief cessation of breathing after inspiration.
• To determine the nasal mucosa's capacity for heat provision during such pauses.

Summary:

• Intranasal temperatures were measured in 15 healthy volunteers at the end of inspiration and 5 seconds after breathing cessation.
• Temperatures increased during breathing pauses, particularly in the nasal valve area, indicating heat provision by the nasal mucosa.
• The anterior nasal segment plays a key role in heating inspired air, essential for humidification.

Impact:

• Highlights the significant role of the anterior nasal segment in thermoregulation of inhaled air.
• Provides insights into the anatomical adaptations of the nose for air conditioning.
• Informs understanding of respiratory physiology and potential implications for conditions affecting nasal function.