Abstract
The rectum and bladder share a common origin and work in harmony; disturbance in one may lead to a similar problem in the other. The two have, however, not previously been investigated dynamically and simultaneously. A new system has been devised allowing dynamic integrated electromyographic proctography to be performed simultaneously with cystometrography in 41 patients (28 women and 13 men). Of 16 women with chronic constipation who underwent the combined study, ten were shown to have obstructed micturition. Eight of these ten women exhibited an inappropriate contraction of the puborectalis muscle during micturition, compared with one of the six with normal micturition (P = 0.02). Of the patients with obstructed micturition, seven of eight women with a rectocele also had anismus, compared with none of four women with a rectocele among those who were able to micturate normally (P = 0.02). Eight of the ten women with obstructed micturition thus had a proctological abnormality that explained the urological symptoms. Of 12 women with idiopathic faecal incontinence who underwent the combined study, eight were shown to have genuine stress incontinence of urine. In seven of these the severity was shown to be of type 2a or greater, indicating that pelvic floor dysfunction may be the causal factor of both rectal and urinary symptoms. The combined study shows abnormalities in one system that could explain similar symptoms in the other.
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