This study included 113 infants with perianal fistulas. In these infants, time of onset of perianal abscesses after birth, the number of anal fistulas, the number of repetitions of treatment and the time interval between treatment and healing were evaluated. Eighty-three had 1 fistula, 23 had 2 fistulas and 7 had 3 or more fistulas. Half of the multi-tract anal fistulas occurred simultaneously and the other half occurred at different times. Peaks in the incidence of these fistulas were observed at 1 month and 6 months after birth (122 112 days). An edgeless U-shaped needle was used to inject 30 silver nitrate solution into the internal orifice of perianal fistulas. Subsequent neutralization was performed by injecting saline into the same internal orifice. In patients with multiple fistulas, each was treated separately in the same manner simultaneously.
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