SAQ 1028 – Respiratory – contextual venous blood gas interpretation

Marked out of 12.00

A junior registrar asks you to interpret a VBG from a 75-year-old man with acute confusion, fever, respiratory distress and known COPD with chronic CO2 retention.

The same VBG result is then considered in a young otherwise healthy post-operative patient.

Parameter	Value
pH	7.21
pCO2	70 mmHg
pO2	75 mmHg
ctHb	140 g/L
sO2	95%
Base excess	0 mmol/L
HCO3	27 mmol/L

Interpret this VBG for the patient with COPD.

(Marked out of 4.0)

/ 4

Interpret the same VBG for a young healthy patient after cholecystectomy.

(Marked out of 4.0)

/ 4

Explain why the same values can have different meanings.

(Marked out of 4.0)

/ 4

Total Score: 0 / 12

Percentage: 0%