Effectiveness of postoperative pain control with intravenous acetaminophen (Acelio) following esophageal cancer surgery: a prospective randomize controlled trial

INTERVENTION: The group with intravenous acetaminofen administration around the clock The group without intravenous acetaminofen administration CONDITION: Esophageal cancer PRIMARY OUTCOME: Reduce of additional dosage of epidual anesthesia by patient control pump and dosage of NSAIDs as rescue drug. SECONDARY OUTCOME: Reduce complaint related to opioid,reduce pain, the time of first gait, flatus, constipation,and hospital stay INCLUSION CRITERIA: The patients planed to recieve thoracoscope assisted esophagectomy and hand assisted laparoscopic gastric tube reconstruction and 2 or 3 fields lymphoadenectomy. Maintain major organ function Got an informed consent