Sleep apnea would be diagnosed in a patient who has which of these findings?
1. More than 15 apnea episodes per hour of sleep
2. More than 5 apnea episodes per hour over an 8-hour period
3. More than 75% of the apneas are obstructive.
4. More than 75% of the apneas and hypopneas are obstructive.
a. 1, 4
b. 2, 3
c. 2, 3, 4
d. 1, 3, 4
D
During a sleep study, obstructive sleep apnea (OSA) is confirmed when either of the following two conditions exists: 15 or more apneas, hypopneas, or RERAs per hour of sleep (i.e., the AHI or RDI >15 events/hour) in an asymptomatic patient. More than 75% of the apneas and hypopneas must be obstructive. Or, 5 or more apneas, hypopneas, or RERAs per hour of sleep (i.e., the AHI or RDI >5/hour events/hour) in patients with symptoms (e.g., sleepiness, fatigue, and inattention) or signs of disturbed sleep (e.g., snoring, restless sleep, and respiratory pauses). More than 75% of the apneas and hypopneas must be obstructive.
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