The procedure for using endoscopy to investigate clinical signs of oesophageal, gastric and small intestine disease, investigate upper GI tract abnormalities found on imaging, and collect samples.
Paradoxical movement. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permissionParadoxical movement. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission