ABGs

Question 1

ABG structure

Answer 1

px demographics
up-to-date
FiO2 px on (room air, 15L NRM etc)
pH
pCO2
pHCO3 (or BE)
pO2 (usually FiO2 - 10)
pCO2

Question 2

what to do if ABG shows hypoxia & hypercapnia

Answer 2

tx hypoxia, hypoxia kills first

Question 3

BiPAP used when

Answer 3

T2RF & acidosis

Question 4

baseline HCO3 in COPD

Answer 4

elevated due to CO2 retention –> renal compensation

Question 5

resp acidosis spot diagnosis (4)

Answer 5

copd
asthma attack
pulm oedema
cns depression

Question 6

resp alkalosis spot diagnosis (3)

Answer 6

hyperventilation issues
anxiety
hypoxia
acute lung insult (PE, pneumonia, initial asthma attack)

Question 7

raised anionic gap acidosis spot diagnosis (Na + K) - (Cl + HCO3)

Answer 7

MUDPILES
- Methanol
- Uraemia
**- DKA
**- Propylene glycol
- Iron/isoniazid
**- Lactate (sepsis)
**- Ethylene glycol
- Salicylates (aspirin)

Question 8

normal anionic gap acidosis spot diagnosis (2)

Answer 8

diarrhoea
renal issues

Question 9

lactic acidosis seen in

Answer 9

DKA
starvation
CVS/resp depression
metformin/poisoning