A prospective cohort study will be performed to explore the effect of postoperative referred pain in the left shoulder on short-term outcomes for laparoscopic（including robot assisted laparoscopic surgery） gastrectomy .The evaluation parameters are overall postoperative morbidity rates,perioperative clinical efficacy and 3-year survival and recurrence rates.
The purpose of this study is to explore the effect of postoperative referred pain in the left shoulder on short-term outcomes for laparoscopic gastrectomy