A 60-year old woman presents with a fever, which she has since 2 days. She has vague upper abdominal pain and feels nauseous. She feels like throwing up. The past 24 hours the fever’s gone up to 39,6Â° C and she’s shivering. Diuresis has decreased. She’s somewhat jaundiced, has a pulse of 112/min and blood pressure is 95/60 mm Hg. There’s little peristalsis and the right upper abdomen is painful on palpation. Blood tests show a massive leukocytosis accompanied by a left shift. Other results include: - haemoglobin: 6,9 mmol/l - sodium: 140 mmol/l - potassium: 6,2 mmol/l - bicarbonate: 18 mmol/l - glucose: 5,3 mmol/l - creatinine: 500 mmol/l - urea: 40 mmol/l ECG reveals spiked T-tops. Chest X-ray is normal. Questions: 1. What investigations should be done? 2. What therapeutic measures should be taken directly?