An esophageal fistula dilator

An esophageal fistula dilator is described. The tool can be used to exert an even pressure around the fistula perimeter to stretch a shrunken fistula and allow the successful insertion of a closure device larger in diameter than that of the original fistula. With this instrument, the process of enlarging the esophageal fistula is accomplished immediately in a time-saving, efficient manner compared to increasing the diameter of the fistula gradually by periodically increasing the diameter of the closure device.