Serions cardiopulmonary malfunction:
Being prone to inducc apnea caused by food, inhalation through
respiratory tract:
Patient that bave serious esophagus varices, and is prone to cause hemorrhage while dilate esophagus.
Terminal inopérable esophagus cancer :
The stricture of anastomosis part:
The esophagus stricture caused by chemical bum:
The stricture caused by esophagus cancer radiotherapy.