Research
Mixed
Nocturnal rostral fluid shift, where fluid accumulated in the legs during the day redistributes to the neck upon lying down, increases tissue pressure and upper airway collapsibility, predisposing individuals to OSAS.
If you have leg swelling, try elevating your legs during the day or wearing compression stockings. This can reduce the amount of fluid that shifts to your neck at night, potentially easing airway collapse.
GoodSupportsHIGH confidence
During recumbency, patients may experience a shift in leg fluid capacity from the legs to the neck, increasing tissue pressure and resulting in narrowing of the upper airway, which increases its collapsibility and predisposes them to OSAS.
Why this rating
Review article citing studies on fluid shift.
Source
Pathophysiological mechanisms and therapeutic approaches in obstructive sleep apnea syndrome
Renjun Lv et al. · Signal Transduction and Targeted Therapy · 2023
DOI 10.1038/s41392-023-01496-3
narrative_reviewCited 412×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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