A flexible sigmoidoscopy is a procedure that is similar to colonoscopy however is limited to examination of the left side of the colon (large bowel). Download the Flexible Sigmoidoscopy 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.