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Concept
Defecography
Summary
Defecography (also known as proctography, defecating/defecation proctography, evacuating/evacuation proctography or dynamic rectal examination) is a type of medical radiological imaging in which the mechanics of a patient's defecation are visualized in real time using a fluoroscope. The anatomy and function of the anorectum and pelvic floor can be dynamically studied at various stages during defecation.
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. It has since become used for diagnosis of various anorectal disorders, including anismus and other causes of obstructed defecation.
It 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".
Defecography may be indicated for the following reasons:
Evaluation of rectal outlet obstruction (obstructed defecation) symptoms
Evaluation of all types of rectal (fecal) incontinence.
Suspected conditions such as internal rectal intussusception, enterocele, anismus, rectocele or sigmoidocele.
To compare pre- and post-surgical repair of rectal outlet obstruction (obstructed defecation).
Specifically, defecography can differentiate between anterior and posterior rectocele. Also, in external rectal prolapse that was not directly visualized during examination, this radiographic projection will demonstrate its presence.
In females, pre-procedural preparation involves smearing a small amount of barium contrast agent in the vagina, which will help to identify if anterior rectocele, enterocele or sigmoidocele is present.
The technique itself involves the insertion of a caulking gun device into the rectum with a 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 fluoroscope which records the defecation.
Official source
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