Clinical nasal obstruction and objective respiratory mode determination

Area of Science:

• Otolaryngology
• Orthodontics
• Physiology

Background:

• Nasal obstruction is a common otolaryngologic symptom with presumed links to facial growth, particularly vertical maxillary excess in orthodontic literature.
• The normal range of oral versus nasal breathing has not been clearly defined, creating a gap in understanding respiratory modes.

Purpose of the Study:

• To correlate patient-reported symptoms of nasal obstruction with objective measurements of respiratory mode.
• To investigate the relationship between nasal obstruction and breathing patterns in adult subjects.

Main Methods:

• A sample of 20 symptomatic adult subjects with nasal obstruction was compared to 20 asymptomatic controls.
• The Simultaneous Nasal and Oral Respirometric Technique (SNORT) was employed to measure respiratory parameters.
• Key metrics included nasal resistance and percent nasality, the proportion of total airflow from nasal breathing.

Main Results:

• Significant differences in nasal resistance were observed between the symptomatic and control groups.
• Percent nasality emerged as a more consistent and statistically significant finding differentiating the groups.
• This suggests percent nasality is a reliable indicator of nasal obstruction.

Conclusions:

• Percent nasality is a key physiological parameter for assessing nasal obstruction.
• The findings have implications for both clinical diagnosis in otolaryngology and basic physiological understanding.
• Further research can explore the link between nasal obstruction, breathing patterns, and facial development.