ABG analysis Patient 1 Patient 2
Pre-operative
On room air pH 7.412 PCO2 38.1 mmHg PO2 78.6 mmHg On 3 liters/min O2 pH 7.295 PCO2 53.1 mmHg PO2 103 mmHg
Intra-operative
FiO2 70% pH 7.32 PCO2 49.1 mmHg PO2 66.7 mmHg FiO2 70% pH 7.281 PCO2 50.9 mmHg PO2 57 mmHg
Post-operative in ICU
FiO2 100%, PEEP 10 mmHg pH 7.42 PCO2 40 mmHg PO2 68.8 mmHg FiO2 100%, PEEP 10 mmHg pH 7.335 PCO2 40.4 mmHg PO2 63 mmHg