Most colorectal polyps are recommended to be performed in two steps, on two separate occasions.
In this case, the first step is to thread a seton thread into the duct.

A fistulotomy is the cutting open of a fistula.
It can only be used for fistulas that run superficially.

LIFT surgery (Ligation of the Intersphincteric Fistula Tract) is the ligation of the fistula tract in the space between the outer and inner ring of the anal sphincter.

The FiXcision tool acts like a circular knife to cut the low fistula passage through both sphincters.

The procedure involves excising the fistula duct using a prep technique, then closing the inner mouth of the duct and covering it with a flap of rotated mucosa.

This procedure is specifically recommended for patients who have an enlarged rectal bulb.