Prospective evaluation of a new device for the treatment of anal fistulas

Figure 2 The procedure. The fistula tract was debrided by curetting (A); the device was placed in the fistula tract via the internal fistula opening (B); the collagen matrices were unsheated in the fistula tract and the disk was sutured to the internal opening (C); the external matrix was sutured to the external opening, which was left open (D).