February 16, 2016 - SG18 - Daytime Sleepiness

Question 1

Predictive Features of OSA

Answer 1

Neck circumference

BMI

Snoring

Nocturnal choking or gasping

Hypertension

Question 2

DDx for Sleepiness

Answer 2

Inadequate total sleep time

Poor quality of sleep

Medical or psychiatric causes

Intrinsic sleep disorders

Question 3

Limitations of Level 3 Testing

Answer 3

Does not diagnose any other disorder other than OSA.

You need polysomnography for other conditions.

Question 4

Treatment for OSA

Answer 4

CPAP

Oral appliance

UPPP (surgery)

Question 5

Chest Paradox in OSA

Answer 5

When the airway is occluded, when the diaphragm engages it will drop the intrathoracic pressure which results in the sucking in of the chest wall on inspiration, rather than the normal expansion.

Question 6

Aa Gradient

Answer 6

Aa Gradient = 130 - (CO₂ / 0.8) - P_aO₂

Question 7

BiPAP

Answer 7

Bilevel positive airway pressure.

Uses a time-cycled change between two different levels of positive airway pressure to basically breathe for you. Can lead to atrophy of the diaphragm and you may want to switch over to CPAP at a later time.