Abstract
The effect of haemorrhoidectomy on anal sphincter manometry and continence to faeces and rectally infused saline was investigated in 24 unselected patients with third-degree haemorrhoids. Haemorrhoidectomy resulted in the abolition of ultra-slow waves and significant decreases in basal and squeeze pressures, though these were reduced to normal values from abnormally high levels. Pressures remained at normal levels up to a year after surgery. An association was found between mucous soiling following surgery and an abnormally low postoperative squeeze pressure. There was no alteration in the function of the recto-anal inhibitory reflex following surgery. Only two patients developed incontinence to rectally infused saline for the first time following surgery. The addition of four-finger dilatation of the anal canal to the operative procedure did not cause any significant differences in sphincter manometry.
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