58-year-old lady with history of obstructive sleep apnoea presented with Syncope. Her venous blood gases showed the following:
PH = 7.391
pCO2 = 57 mmHg
HCO3 = 34 mmol/L
Na = 139 mmol/L
K = 2.4 mmol/L
Cl = 90 mmol/L
Hb = 134 g/L
Glucose = 12.1 mmol/L
Lactate = 2.6 mmol/L
Creatinine = 65 umol/L
explain these results