Obesity Flashcards
General anesthesia causes FRC to fall by how much? Compared to non-obese pt?
50%
20%
What is the optimal tidal volume for a patient with class 3 obesity?
6-8 ml/kg IBW
CO increases by ___ mL/min for every extra kilogram of fate
100
_____ may be the most useful confirmation of pHTN
Tricuspid regurg on the TEE
Water-soluble drugs are calculated with ____
Ideal body weight
Lipid-soluble drug doses are calculated with ___
Total body weight
LBW calculation
LBW = IBW x 1.3
OSA is defined as the cessation of airflow for at least _____ with __ or more unsuccessful efforts to breathe and a greater than __% reduction in SaO2
10 seconds;
5;
4
A 50% reduction in airflow for 10 seconds, 15 or more times per hour, linked to snoring and decreased oxygen saturation
Hypopnea
What apnea/hypopnea index score is consistent with mild OSA?
______ is the definitive test for OSA
Polysomnography
How do you calculate the severity of OSA?
of episodes of apnea/hypopnea divided by hours of sleep
What is the classic triad of
Dysfunctional sleep?
- Apnea or snoring w/ hypopnea
- Arousal from sleep
- Daytime somnolence
The classic presentation of obesity hypoventilation syndrome includes:
Episodes of apnea during sleep WITHOUT any respiratory effort
Diagnostic criteria for OHS
BMI > 30 kg/m2
Awake PaCO2 > 45 mmHg
Dysfunctional breathing during sleep
What is the most sensitive sign of anastomotic leak following gastric bypass?
