Seton drainage in high transsphincteric anal fistula - general and visceral surgery
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Assessing the fistula
With the patient in lithotomy position, perform a digital rectal examination followed by slow and careful dilation of the anal sphincter. Insert the Parks retractor After careful retrograde probing and instillation of contrast agent, the inner internal opening of the fistula is found high in the anal canal at 5 o'clock.
Excising the external opening of the fistula
Dissecting the fistula from ischioanal fatty tissue
Dissecting the fistula at the external anal sphincter
Excising the extrasphincteric segments of the fistula
Inserting a silicone seton
date of update: 11.03.2023
date of publication: 05.07.2014
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