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Dyssynergic defecation is common and affects one-quarter or more of patients with chronic constipation. It is due to an inability to coordinate the abdominal and pelvic floor muscles to evacuate stools. It is possible to diagnose this problem through a history, examination, and specialized tests of anorectal function.

Randomized controlled trails have now shown that biofeedback therapy is effective and superior to other treatment approaches. The symptom improvement is due to a change in underlying function of the muscles and nerves involved with defecation. Wider availability of biofeedback therapy could result in significant improvement of symptoms for patients with this disorder.


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