ABSTRACT
A 27-year-old woman presents to Accident and Emergency (A and E) with vomiting and hearing disturbance. She has a medical history of depression. An arterial blood gas on room air demonstrates the following: https://www.niso.org/standards/z39-96/ns/oasis-exchange/table">
pH
7.55
PO2
10 kPa (normal > 10.6 kPa)
PCO2
3.4 kPa (normal range: 4.7–6 kPa)
Bicarbonate
26 mmol/L (normal range: 24–30 mmol/L)
Base excess
–1.5 mmol/L (normal range: −2 to +2 mmol/L)
