Sleep Study Interpretation (Mod 4)

Question 1

How does obstructive sleep apnea (OSA) present on a PSG?

Answer 1

Lack of airflow with effort

Question 2

How does Obstructive Hypopnea present on a PSG?

Answer 2

Consistent air flow, no paradoxical effort notes between ribs and abs (in sync)

Question 3

How does mixed sleep apnea present on a PSG?

Answer 3

Lack of airflow and lack of resp. efforts (central component) and resp. efforts resume w/o airflow (obstructive component)

Question 4

How does UARS present on a PSG

Answer 4

No detectable decrease in airflow.

• resp effort related arousals

Question 5

Flat line for airflow indicates

Answer 5

Apnea

Question 6

What does increased effort indicate?

Answer 6

obstructive sleep apnea

Question 7

Central apnea vs obstructrive apnea vs mixed apnea image

Answer 7

• Central - primary sleep apnea - repetitive stopping or shallow breaths reducing airflow and ventilation
• Obstructive - apneas, hypopneas and respiratory effort related arousals
• Mixed - begins with Central and is followed by obstructive