Related Experiment Videos
Posture and nasal patency: evaluation by acoustic rhinometry
Y Kase1, O Hilberg, O F Pedersen
1Department of Otolaryngology, Tokyo University Branch Hospital, Japan.
Acta Oto-Laryngologica
|January 1, 1994
Summary
Nasal passage dimensions change with body posture due to hydrostatic and local reflexes affecting the nasal cavity mucosa. These postural variations are significant for nasal airway studies.
Area of Science:
- Rhinology
- Human Physiology
- Biomedical Engineering
Background:
- Nasal passage geometry influences airflow and physiological responses.
- Understanding nasal airway dynamics is crucial for clinical and pharmacological studies.
Purpose of the Study:
- To investigate the impact of different body postures on nasal passage geometry.
- To assess the sensitivity of nasal airway measurements to postural changes.
Main Methods:
- Acoustic rhinometry was used to measure nasal passage geometry in 8 healthy students.
- Measurements included minimum cross-sectional area (A-min) and volume in various head and body postures.
Main Results:
- Total nasal airway dimension decreased by ~16% when moving from sitting to horizontal posture.
- Standing up increased nasal airway dimension by ~12%.
- Minimum cross-sectional area (A-min) proved more sensitive to postural changes than volume.
Conclusions:
- Nasal cavity mucosa exhibits a composite response to systemic and local conditions influenced by postural changes.
- Vascular and cutaneous reflexes likely mediate these observed nasal airway variations.
- Postural effects on nasal geometry must be considered in environmental, clinical, and pharmacological research.