ABG - Acid Base Balance Flashcards
1
Q
What is the MOST COMMON ARTERIAL PUNCTURE SITE?
A
Radial Artery
2
Q
What are some other arterial puncture sites?
A
Brachial, femoral artery
3
Q
What is the vapor pressure at body temperature?
A
47 mmHg
4
Q
What are causes of low PaO2 (arterial)?
A
High alveolar PCO2 (hypoventilation)
Low FIO2 (fraction)
Low Barometric pressure (altitude)
Low exchange of CO2 vs O2 (R)
Matching of ventilation and perfusion
- Shunt - V/Q - Dead space
5
Q
How to calculate an expected A-a gradient (ie. A-aDO2)?
A
0.4 * age
6
Q
What is the equation for PAO2?
A
PAO2 = FIO2(PB-47) – (PaCO2/0.8)
