Preparation for defecography exams begins from home, which includes taking laxatives/and or enemas to clean out the colon.
Before the X-ray is taken, with the use of a catheter, a special fluid is inserted into the bladder so it will show up on the X-ray. A gel is then placed in the vagina and a paste is placed on the rectum, so they will also be visible on X-ray.
You will be required to sit on a commode and defecate as X-rays are taken. These pictures allow radiologists to measure whether there has been any shift in the pelvic organs.