Quantifying the extent of fistulotomy. How much sphincter can we safely divide? A three-dimensional endosonographic study

2012 
Purpose To quantify the longitudinal division of the internal anal sphincter (IAS) and external anal sphincter (EAS) after fistulotomy using three-dimensional endoanal ultrasound (3D-EAUS) and correlate the results with postoperative faecal incontinence.
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