Head-Of-Bed Elevation (HOBE) for Improving Positional Obstructive Sleep Apnea (POSA): An Experimental Study

Area of Science:

• Sleep Medicine
• Respiratory Physiology
• Otolaryngology

Background:

• Obstructive sleep apnea (OSA) is a common sleep disorder characterized by recurrent upper airway collapse.
• Current treatments for OSA often involve continuous positive airway pressure (CPAP) or oral appliances.
• Positional therapy, including head-of-bed elevation, is an emerging strategy to manage OSA.

Purpose of the Study:

• To evaluate the effectiveness of a 30° head-of-bed elevation (HOBE) position in mitigating upper airway obstructions in patients with obstructive sleep apnea (OSA).
• To assess the impact of HOBE on polysomnography (PSG) parameters and patient-reported outcomes.

Main Methods:

• A prospective trial involving 45 OSA patients who underwent simultaneous drug-induced sleep endoscopy (DISE) and polysomnography (PSG).
• DISE and PSG were performed at 0° (supine) and 30° HOBE positions to evaluate airway collapse and respiratory events.
• Patient feedback on sleeping in the HOBE position was collected via a questionnaire.

Main Results:

• A significant reduction in velum and oropharynx lateral wall collapses was observed at 30° HOBE compared to the 0° position.
• No significant differences in tongue base or epiglottis obstruction were found between the two positions.
• The average apnea-hypopnea index (AHI) decreased from 23.8 to 17.7 (p=0.03), and the percentage of apneas decreased from 55% to 44% (p=0.05) with HOBE.

Conclusions:

• Adopting a 30° HOBE position effectively reduces upper airway collapses in OSA patients.
• This simple positional modification leads to a significant improvement in apnea/hypopnea events and nightly respiratory outcomes.
• HOBE presents a viable non-invasive strategy for managing obstructive sleep apnea.