A 26-year-old man with pyloric stenosis has repeated vomiting. ABG shows pH 7.55, PaCO2 6.2 kPa, HCO3- 42 mmol L-1 and chloride 86 mmol L-1. What is

Question

A 26-year-old man with pyloric stenosis has repeated vomiting. ABG shows pH 7.55, PaCO2 6.2 kPa, HCO3- 42 mmol L-1 and chloride 86 mmol L-1. What is the most likely primary disturbance?

Accepted Answer

Respiratory acidosis from hypoventilation

Answer

Metabolic acidosis with respiratory compensation

Answer

Mixed respiratory alkalosis and metabolic acidosis

Answer

Respiratory alkalosis with renal compensation

Answer

Hypochloraemic metabolic alkalosis

Hypochloraemic metabolic alkalosis — FRCA Primary MCQ

A 26-year-old man with pyloric stenosis has repeated vomiting. ABG shows pH 7.55, PaCO2 6.2 kPa, HCO3- 42 mmol L-1 and chloride 86 mmol L-1. What is the most likely primary disturbance?