"with the patient in the prone position, barium is slowly administered until it reaches the mid-transverse colon."
"after it reaches this point, drain the barium from the distal rectosigmoid and rectum."
"One of the most important considerations for a barium enema is the density and viscosity of the barium. Ideally contrast should be dense enough to coat mucosal lesions. If it is too dense however, then not only will the fluoroscopic tube potentially "burn out" the background image and obscure overlapping loops, it may obscure smaller (and sometimes large!) colonic lesions. Where this optimal density lies is dependent on one's fluoroscopic equipment and available contrast solutions. In general, 100% w/v is not a bad target."
"Scout (if indicated) views are shown below:"
"AP abdomen"
"AP pelvis"
"RPO"
"splenic flexure, erect RPO"
"proximal descending colon, erect RPO"
Expected headings
"Practical points"
"There are few contraindications:"
"The patient should be in the left lateral decubitus position at the beginning of the exam, with the knees bent, in preparation for placement of the rectal tube. Visually inspect the anus before inserting the tube, to ensure that the balloon will not be inflating against an obvious abnormality (e.g. large varices, inflammatory bowel disease, carcinoma, sinus tract, etc.)."
"The following is one technique for a generic double contrast exam. If the exam is for evaluation of a known lesion or for a targeted area, it can be modified (e.g. right colon only for an incomplete colonoscopy)."
"mid transverse colon, erect or supine"
"indication for routine preliminary radiograph of the abdomen scout is dependent on local policy. In some centres, all inpatients and outpatients with a history of gastrointestinal surgery or clinical history suggestive of bowel obstruction, perforation, inflammatory bowel disease, fistula, abscess or suspicions of inadequate bowel preparation undergo preliminary radiograph of the abdomen 1"