ISR

Question 1

Arousal Hypopnea

Answer 1

1) 30% OR greater decrease of pressure transducer amplitude ( nasal cannula)
2) an arousal OR a 3% oxygen Desat is to be scored as Hypopnea
2. 2 % Desat but w/ Arousal can be scored

Question 2

Arousals occipital / Central Region

Answer 2

Cortical arousal
As evidence by change in EEG sub cortical arousals as evidence of changes in the heart rate

Sub cortical ( not scored as arousal no EEG arousal)

Question 3

Scoring arousals

Answer 3

Score during n1, n2, n3, R

If There is an abrupt shift of EEG frequency including alpha, theta and OR frequency greater than 16 HZ (but not Spindles)

Last at least 3 sec

W/ at least 10 sec of stable Sleep preceding the change

Scoring of an arousal during REM requires a concurrent increase in submental EMG Chin lasting at least 1 sec

Arousals May occurred during Stage W and may occur w/ Respiratory events