From:  Multiple abnormalities of anorectal physiology co-exist with dyssynergia in patients with functional defecatory disorder—an observational study based on the London classification

 Frequency of anorectal disorders among participants based on the London classification.

ParameterFrequency (%)
Disorder of the recto-anal inhibitory reflex
Recto-anal areflexia (n, %)0 (0%)
Disorders of anal tone and contractility
Anal hypertension (n, %)2 (2%)
Combined anal hypotension and hypocontractility (n, %)1 (1%)
Anal hypotension with normal contractility (n, %)9 (9%)
Anal normotension with hypocontractility (n, %)4 (4%)
Disorders of recto-anal coordination
Abnormal expulsion with normal manometric pattern of recto-anal coordination (n, %)0 (0%)
Abnormal expulsion with dyssynergia (n, %)85 (85%)
Abnormal expulsion with poor propulsion and dyssynergia (n, %)15 (15%)
Abnormal expulsion with poor propulsion (n, %)0 (0%)
Normal expulsion with abnormal manometric pattern of recto-anal coordination (n, %)0 (0%)
Disorders of rectal sensation
Rectal hyposensitivity (n, %)4 (4%)
Borderline rectal hyposensitivity (n, %)5 (5%)
Rectal hypersensitivity (n, %)0 (0%)
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