3 - Diagnostics: ABG Flashcards
1
Q
ABG three components
A
pH = 7.4
PaCO2 = 40
PaO2 = 100
2
Q
Always give ABG in what order
A
pH > PCO2 > PO2
3
Q
Allens test
A
Occlude radial and ulnar arteries to check for perfusion
4
Q
Shortened HH equation
A
pH (proportional to) HCO3/PaCO2
5
Q
In acute, For every rise of 10 in pCO2
A
pH drops by .08
6
Q
Chronic resp.
PaCO2 increase by 10
A
pH decreases by .03
7
Q
Room air FiO2
A
21%
8
Q
PaO2
A
Dissolved arterial oxygen
9
Q
spO2
A
Oxygen saturation (on Hb)
10
Q
SaO2
A
saturation via chem lab (instead of finger probe)
11
Q
PiO2
A
Pressure inspired oxygen in trachea
12
Q
Alveolar oxygen - arterial oxygen
A
A-a gradient
13
Q
A-a gradient eq
A
PiO2 - (PaCO2) - PaO2
14
Q
Normal A-a gradient
A
Age/4 + 4
15
Q
SpO2 vs PaO2 curve
A
Sigmoidal bc of positive cooperativity of hemoglobin
