Sleep Disordered Breathing Clinical Trial
Official title:
Incidence of Sleep-disordered Breathing and Upper Airway Collapsibility in Postpartum Patients and Its Intervention
The investigators hypothesized that sleeping in a 45 degrees elevated body position decreases the likelihood of upper airway vulnerability to collapse early after delivery. Furthermore, the investigators want to elucidate the anatomical and physiological risk factors that contribute in the upper airway obstruction in post-partum patients.
After obtaining study consent, each patient underwent measurements of upper airway
cross-sectional area (CSA) during daytime within 48 h after delivery. The minimum upper
airway CSA was measured using acoustic pharyngometry (Eccovision Acoustic Pharyngometry;
Sleep Group Solutions, Inc) in sitting, 45° elevated, and nonelevated upper body position.
This method has been previously used and validated in pregnant women.
In the patients who further gave consent for the sleep study, polysomnography (PSG) was
performed throughout the entire study night. Within a crossover design, patients were
randomly assigned to receive first either nonelevated or 45° elevated upper body position.
Position was changed after 3.5 h by a member of the team.
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