Polysomnography - Respi Events

Question 1

What are the 3 criteria to Dx a hypopnea?

Answer 1

1. at least 30% drop in airflow
2. lasts at least 10 sec
3. at least 3% drop in saturation or arousal

Question 2

How long is an epoch?

Answer 2

30 sec

Question 3

What are the 2 criteria to Dx an apnea?

Answer 3

1. less than 10% of airflow

2. at least 10 sec

Question 4

What are the criteria for scoring a RERA?

Answer 4

> /=10 sec of increasing respi effort or by flattening of airflow leading to arousal from sleep (when not apnea or hypopnea)

Question 5

Cheyne-Stokes respiration: there are at least ___ consecutive central apneas/hypopneas separated by a crescendo/decrescendo change in breathing amplitude with a cycle length of at least ___ seconds.

Answer 5

3; 40

Question 6

Cheyne-Stokes respiration:
There are at least ___ central apneas/hypopneas per hour of sleep w/ crescendo/decrescendo pattern over at least ___ hrs.

Answer 6

5; 2

Question 7

What are the two criteria that must both be met to score Cheyne-Stokes respiration?

Answer 7

A. At least 3 central apneas/hypopneas in crescendo/decrescendo pattern over 40 secs

B. At least 5 central apneas/hypopneas in crescendo/decrescendo pattern per hour for at least 2 hrs.

Question 8

What is the AHI or RDI required to Dx OSA if there are associated Sx of disturbed sleep?

Answer 8

At least 5; at least 75% of apneas/hypopneas must be obstructive

Question 9

What is the AHI or RDI required to Dx OSA if there are NOT associated Sx of disturbed sleep?

Answer 9

At least 15; at least 75% of apneas/hypopneas must be obstructive