Early Capsule Endoscopy in Acute Upper Gastrointestinal Bleeding.

INTERVENTION: This research involves procedures and clinical care which are performed as standard practice currently. Patients with a negative gastroscopy will be randomised to either the control group and receive a Colonoscopy, or the intervention group and receive a Capsule Endoscopy as their second investigation. Those patients randomised to the Capsule Endoscopy group will be orally administered a single disposable endoscopy capsule which will pass through the gastrointestinal tract taking continuous images that will be sent to a data receiver, This data will be downloaed and interpreted by a trained gastroenterologist. This will all be completed during athe same inpatient hospital admission. CONDITION: Acute upper gastrointestinal bleeding PRIMARY OUTCOME: The primary outcome will be the proportion of patients in whom a source of bleeding is identified on capsule endoscopy or colonoscopy. SECONDARY OUTCOME: A secndary outcome will be number of hospital representations which will be determined through review of the electronic medical records. A secondary outcome will be length of hospital stay which will be determined through review of electronic medical records. A secondary outcome will be number of blood transfusions received by a patient which will be determined through review of their electronic medical records. INCLUSION CRITERIA: Participants will be males or females who present with acute melaena and/or haematemesis and have a negative gastroscopy.