When is defecography indicated in the workup of constipation?

Updated: Jul 05, 2019
  • Author: Marc D Basson, MD, PhD, MBA, FACS; Chief Editor: BS Anand, MD  more...
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Answer

Defecography should be performed if an obstruction is suspected at the level of the anal canal. Fill the rectosigmoid with barium paste and fluoroscopically observe the act of defecation. This test may demonstrate alterations in the anorectal angle during defecation, presence of pelvic floor weakness, [15] or transient rectal prolapse or intussusception.


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