Blue Dye Test Fistula

Blue Dye Test Fistula. Methylene blue dye was injected through a transcervical catheter (figure 2). Seeing the tampon turn blue would indicate a fistula.

We describe a novel technique of retrograde vaginal methylene blue testing that may assist in the proper localization of the fistulous opening. Of 75 patients who underwent cerclage in two retrospective case reviews, the overall incidence of fistula was 1.3% and abscess was also 1.3%.