mrcem2-1702

A 42 year old male is brought into the emergency department after being discovered unconscious in a park with two empty beer bottles and several empty boxes of painkillers at his side. An arterial blood gas is obtained and the results are as follows:

Parameter Result
pH 7.19
pO2 11.8 KPa
pCO2 3.2 KPa
HCO3- 14 mmol/L
BE -7.8

Which of the following most accurately characterizes the acid-base imbalance?