|
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. The apneas (pauses in breathing) must last for at least 10 seconds and be associated with a decrease in blood oxygenation. Combining AHI and oxygen desaturation gives an overall sleep apnea severity score that evaluates both the number of sleep disruptions and the degree of oxygen desaturation (low oxygen level in the blood). The AHI is calculated by dividing the number of apnea events by the number of hours of sleep. The AHI values are categorized as:〔(【引用サイトリンク】url=http://healthysleep.med.harvard.edu/sleep-apnea/diagnosing-osa/understanding-results )〕 *Normal: 0-4 *Mild sleep apnea: 5-14 *Moderate sleep apnea: 15-29 *Severe sleep apnea: 30 or more ==Risks associated with a high AHI== Research shows that individuals suffering from obstructive sleep apnea are at a higher risk of other health comorbidities, including: *Acute myocardial infarction/heart attack (obstructive sleep apnea presents in 70% of heart attack patients with AHI ≥5 and 52% of heart attack patients with AHI ≥10) *Stroke (in patients with AHI ≥30 macroangiopathic etiology of stroke were significantly higher than in patients with AHI <10) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Apnea–hypopnea index」の詳細全文を読む スポンサード リンク
|