The aim of Parks' technique is the preservation of alithe externa! sphincter. Crypt resection with a sectionof the interna! sphincter prevents relapses and the setonplaced in the traject ensures drainage. In spite ofthis, in 20% of the cases, delayed sphincter section isnecessary because of trajee! persistence. In a series ofcases authors used Parks' technique but instead of placingSeton, the externa! muscular orifice was closedfrom the a·nal canal with Dexon 4-0 stitches. Resultswere optimum from the point of view of trajects' primaryhealing (1-2 weeks), rather slower for the interna!defect (3-5 weeks) with no subsequent incontinence sequel.No relapses were found in follow-ups of 4 monthsup to 5 years.

El objetivo de la técnica de Parks es la preservaciónde la totalidad del esfínter externo. La resección de lacripta con un sector de esfínter interno evita las recidivas,el seton colocado en el trayecto asegura el drenaje.A pesar de ello en un 20% de los casos es necesariola sección diferida del esfínter por persistencia del trayecto.