| Defecating proctogram | |
|---|---|
| Diagnostics | |
| MeSH | D019841 |
The defecating proctogram or defecography is an imaging study performed by a radiologist in which the mechanics of a patient's defecation are visualized in real time using a fluoroscope.[1]
Defecating proctography was pioneered in 1945 during World War II. The procedure gained popularity at this time in the midst of an outbreak of whipworm, which is known to cause rectal prolapse.[2] It has since become the gold standard for diagnosis of any of a number of rectal contractile disorders, including anismus.
It has since has fallen out of favor due to inadequate training in the technique. It is now only performed at a few institutions. Many radiology residents refer to the procedure as the "Def Proc", "Defogram", or "Stool Finale".
In females, pre-procedural preparation involves smearing a small amount of barium contrast in the vagina while carefully avoiding the rectum. This can often prove to be somewhat challenging, depending on the physique of the individual.
The technique itself involves insertion of a caulk gun device into the rectum with subsequent manual infusion of barium paste until there is adequate distension. The patient is then transferred to a portable plastic commode which is situated next to a flouroscope which records the defecation. Positioning of the x-ray camera is of paramount importance as visualization of the buttocks, rectal vault, and lower pelvis is critical.
More recent techniques involve the use of advanced, cross-sectional imaging modalities such as magnetic resonance imaging.[3]
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