MSFinals-6353

MSFinals-6353

A 55-year-old man is 1 week post right-hemicolectomy for colorectal cancer and formation of ileostomy. He reports experiencing intermittent shortness of breath and an arterial blood gas sample was taken, revealing the following results outside of normal range:
pH: 7.25 (7.35 – 7.45)
pO2: 11.1 (10 – 14)kPa
pCO2: 3.2 (4.5 – 6.0)kPa
HCO3: 11 (22 – 26)mmol/l
BE: -15 (-2 to +2)mmol/l
Na: 110 135-145 mmol/l
K: 3 3.5-5 mmol/l

What are the possible differential diagnoses for this patient based on the given information?