FCA1-0405

FCA1-0405

With a 10-day history of severe vomiting, a 71-year-old man with a gastric outlet obstruction is admitted to the surgical ward. The serum biochemical results listed below are available: Sodium 128 mmol/L (137-144), Potassium 2.6 mmol/L (3.5-4.9), Chloride 50 mmol/L (95-107), Urea 12 mmol/L (2.5-7.5), Creatinine 180 µmol/L (60-110). Which of the following do you think you are most likely to encounter?