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Table 74.4

Urgent Investigation in Acute Lower GI Bleeding

Full blood count

Group and screen serum: crossmatch at least four units of whole blood if there is shock, significant blood loss or initial haemoglobin <100g/L

Coagulation screen

Sodium, potassium, urea and creatinine

Liver function tests

ECG if age 50 or known cardiac disease

Chest X-ray