""Heat may also destabilize breathing control, increase fluid retention, and promote dehydration, all of which can make the upper airway more collapsible and increase the likelihood of sleep apnea,""
""Obstructive sleep apnea occurs when the upper airway becomes unstable and collapses during sleep,""
""Air pollutants can increase this instability by irritating the tissues of the throat, making the airway narrower and more prone to collapse when muscle tone naturally falls at night. Nitrogen dioxide is a strong airway irritant and may promote local inflammation that can fragment sleep and destabilize breathing.""
Heat can destabilize breathing control, increase fluid retention, and promote dehydration, making the upper airway more collapsible and increasing sleep apnea risk. Urban air pollution is expected to increase sleep apnea prevalence by chronically affecting nighttime breathing. Both short- and long-term exposure to PM2.5 particles from vehicle exhausts, factory emissions, and wildfires raises the likelihood of sleep apnea because these particles penetrate deep into the lungs and bloodstream. Nitrogen dioxide acts as a strong airway irritant that narrows the airway, promotes local inflammation, fragments sleep, and destabilizes breathing, worsening symptoms in people with existing sleep apnea. Indoor air filtering devices can help mitigate risk.
Read at WIRED
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