MSFinals-6315
A 65-year-old woman presents with severe colicky central abdominal pain, vomiting, and the passage of abnormal stool which had the appearance of redcurrant jelly.
On examination, temperature was 37.5°C, she has a pulse of 120 bpm with an irregular rate. Palpation of the abdomen revealed generalised tenderness and peritonitis.
Investigations reveal:
Haemoglobin 128 g/L (120-160)
White cell count 30 ×109/L (4-11)
Lactate 9 mmol/L (<2) pH 7.10 (7.36-7.44) She was taken to theatre for emergency surgery. What is the likely diagnosis?