Defecography (cont.)

Anorectal Disorders Exhibiting Pathologic
Defecograms (cont.)
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Incontinence
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Defecography is difficult to perform in incontinent patients because
they are unable to retain the barium paste while going from the stretcher
to the commode.
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Classically in this condition, defecography shows an open
anal canal due to anal sphincter hypotonia and an abnormally increased ARA
(>130°) due to a hypotonic puborectalis muscle.
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However, several studies
indicate that incontinent patients may or may not have an abnormally
increased ARA at rest or an abnormal excursion of the anorectal junction.
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