Fistula and diving decompression sickness are not patients who need complicated treatment. All hospitals with hyperbaric oxygen chambers can be treated. Like this, most secondary hospitals are located in all tertiary hospitals, such as Tianjin No.1 Central Hospital, Tianjin No.2 Central Hospital, Cancer Hospital Huanhu Hospital, and Tianjin Medical University First Affiliated Hospital Second Affiliated Hospital. Wait, wait, wait too long!