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The Apnea–Hypopnea Index or Apnoea–Hypopnoea Index (AHI) is an index used to indicate the severity of sleep apnea. It is represented by the number of apnea and hypopnea events per hour of sleep. Apnea is the complete absence of airflow through your nose and mouth. Hypopnea is a partial collapse of your airway, limiting breathing.
The American Academy of Sleep Medicine uses RDI to determine the severity of Obstructive Sleep Apnea according to the following range: 5–14.9 for mild, 15–29.9 for moderate, and 30+ for severe, similar to the one used in the AHI. [6]
For those with obstructive sleep apnea unable or unwilling to comply with first line treatment, the surgical intervention has to be adapted to an individual's specific anatomy and physiology, personal preference and disease severity. [114] Uvulopalatopharyngoplasty with or without is the most common surgery for patients with obstructive sleep ...
Obstructive sleep apnea, which is characterized by brief interruptions in breathing during sleep, affects roughly 1 billion people globally, according to a 2019 study published in The Lancet.
More than half of people with obstructive sleep apnea have some degree of positional obstructive sleep apnea, meaning that it gets worse when they sleep on their backs. [69] Sleeping on their sides is an effective and cost-effective treatment for positional obstructive sleep apnea. [69]
Sleep apnea is measured by the apnea-hypopnea index (AHI). An AHI is determined with a sleep study. AHI values for adults are categorized as: [2] [3] Normal: AHI<5; Mild sleep apnea: 5≤AHI<15; Moderate sleep apnea: 15≤AHI<30; Severe sleep apnea: AHI≥30; An episode is when a person hesitates to breathe or stops their breathing altogether.