Author Question: Sleep apnea would be diagnosed in a patient who has which of these findings? 1. More than 15 ... (Read 56 times)

panfilo · **on:** Jul 16, 2018

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

Question 2

After the inhalation of a bronchodilator, what percentage change in peak expiratory flow (PEFR) would be required to demonstrate reversible airflow limitation consistent with asthma?

a. 20
b. 10
c. +10
d. >20

cpetit11 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

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.

Answer to Question 2

D
After a bronchodilator, an improvement of 20 or greater in the PEFR would demonstrate positive airway response to the bronchodilator, consistent with asthma.