What is a seton?
A seton is a drainage device used to control and treat an anal fistulous abscess. It is inserted through and through a fistula tract and secured to itself, thus making a circle about some portion of the anal sphincter muscle. It serves as a cutting device to exteriorize the fistula slowly. Typical setons are Penrose drains, Silastic vessel loops, or silk sutures.
common indications for inserting a seton
• High fistulous abscesses involving greater than one-half the length of the anal canal muscle
• Anterior fistulas in a woman
• Inflammatory bowel disease
• Older adult patients or patients with multiple previous anorectal surgeries