ABSTRACT
The operation of postanal repair was originally devised by A. G. Parks as a method of improving anal incontinence by increasing the angle between the lower rectum and upper anal canal — the anorectal angle. There is some dispute regarding the real mechanism by which continence is restored by this procedure as well as controversy relating to the role played by the anorectal angle in maintaining continence. The operation has been advocated for the treatment of complete rectal prolapse and solitary rectal ulcer syndrome, on the basis that a perineal approach causes minimal traumatic damage to the pelvic nerves, so minimizing the dangers of causing sexual and urinary difficulties postoperatively. Minimal preoperative preparation is required. A full bowel preparation is unnecessary and can be confined to a rectal washout on the morning of the procedure.
