Post-Bariatric Surgery Acute Abdomen

You are an anaesthetist at a metropolitan private hospital. A 22-year-old woman requires surgery for an acute abdomen. She is day 4 post-laparoscopic sleeve gastrectomy that was performed for obesity. The ICU specialist has called you with her blood results. Results: sodium 140 (135–145 mmol/L) potassium 3.0 (3.5–5.5 mmol/L) chloride 112 (95–110 mmol/L) bicarbonate 16 (20–32 mmol/L) urea 8.7 (3.5–8.5 mmol/L) creatinine 90 (60–110 µmol/L) urate 0.41 (0.20–0.50 mmol/L) calcium 2.10 (2.15–2.55 mmol/L) phosphate 0.80 (0.80–1.50 mmol/L) magnesium 0.58 (0.65–1.00 mmol/L) glucose 14.2 (3.6–6.0 mmol/L) Usual medications: empagliflozin 10 mg daily escitalopram 20 mg daily lansoprazole 30 mg bd metformin 500 mg bd vitamin D 1000 IU daily