Anastomotic fistula is an inevitable complication after esophageal cancer surgery, the patient suffers from doctor embarrassment, intravenous high nutrition, chest drainage irrigation is the treatment of anastomotic fistula, about a week, the anastomotic fistula thinks it is healed, how to verify na? Iodine water imaging and so on is very troublesome, and some hospitals in Meilan have no medicine. There is a method for colleagues to refer to. Rice soup + iodine vapor = ? This should be known to everyone. If the anastomotic fistula is healed, a small amount of fluid can be fed, the pus cavity is flushed with iodophor, there is iodophor residue in the pus cavity, let the patient drink a small amount of rice soup, if the fistula is not healed, then the drainage fluid is blue, a color with Melan, if it is healed, the drainage fluid does not change color. The first time I did such a test in front of the patient and family, first in vitro, a urine cup with 10 ml of rice broth, rice broth is light yellow, and then a few drops of iodophor, the result of the rice broth becomes orchid, the family patients understand, active cooperation, and to win back the respect of patients and families.