Visualizing natural sleep state during nasolaryngoscopy in infants: A feasibility study

Area of Science:

• Pediatric Otolaryngology
• Pediatric Airway Disorders

Background:

• Infant airway obstruction evaluation commonly uses nasolaryngoscopy.
• Traditional awake nasolaryngoscopy is limited by infant distress and short examination times.
• Drug-induced sleep endoscopy requires anesthesia and operating room resources.

Purpose of the Study:

• To evaluate Time-Induced Sleep Endoscopy (TISE) as a brief, non-invasive method for assessing sleep-related airway dynamics in infants.
• To determine the success rate and factors influencing TISE in infants.
• To compare airway obstruction findings between awake and TISE.

Main Methods:

• Prospective study of infants under three months requiring bedside flexible nasolaryngoscopy.
• Nasolaryngoscope inserted until infant slept (5-min cutoff).
• Videos scored for obstruction using Sleep Endoscopy Rating Scale; logistic regression analyzed success factors.

Main Results:

• TISE was successful in 57.9% of 19 infants, with average sleep time of 3.1 minutes.
• Infants under three weeks were 8 times more likely to fall asleep (p=.048).
• TISE revealed significantly more airway obstruction, particularly hypopharyngeal (100% vs 18%, p=.004), compared to awake endoscopy.

Conclusions:

• Time-Induced Sleep Endoscopy (TISE) can visualize sleep-related airway obstruction in some infants.
• The method shows promise as a less resource-intensive alternative to traditional methods.
• Further validation is required for widespread clinical adoption.