After introducing the equipment, and by reference to interventional surgery, there are two steps that must be completed under fluoroscopy before treating the child with this procedure.
First, determine whether the tube has been correctly positioned inside the body, whether it is properly secured, and whether the volume of the fixing balloon is too large or too small.
With practiced hands, Doctor Yang moved the control lever to fluoroscope the child's anal area. A small bright mass appeared on the machine screen, indicating that the balloon was fully filling and sealing the anus.
The tube wasn't leaking or displaced, so they could start insufflation. At this point the insufflation was not yet for treatment; as in an interventional surgery protocol, they had to first verify that the preoperative diagnosis was correct before proceeding.
