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A colonoscopy is a procedure that enables examination of the colon (large bowel) using a flexible colonoscope (camera).  Download the Colonoscopy Patient Information Leaflet to find out more about this procedure including indications, alternatives, preparation, the examination, potential risks and post procedural monitoring and guidance.  This procedure is performed in The Royal Gwent Hospital (RGH), Nevill Hall Hospital (NHH) or Ysbyty Ystrad Fawr (YYF) as an outpatient or The Grange University Hospital (GUH) as an inpatient.