Comparison of Vagus Nerve-preserving RADG and Conventional RADG for AGC

Inclusion Criteria:

1. Male or female, aged less than 70 years and more than 18 years;
2. Underwent gastroscopy and biopsy - preoperative definite for advanced gastric cancer invasion depth is T2, T3;
3. The lesion is in the middle and lower stomach;
4. Magix routine upper gastrointestinal barium meal, endoscopic ultrasonography, abdominal CT and chest X ray examination, clearly no nerve invasion and adjacent organ invasion and distant metastasis;
5. The preoperative examination of lung, liver, heart, renal insufficiency, surgical contraindication;
6. The preoperative abdominal CT or abdominal ultrasound without biliary disease and gallbladder stones;
7. No history of gastrointestinal dysfunction and other malignant tumor history;
8. The patients voluntarily participate in the study and signed informed consent.

Exclusion Criteria:

1. Older than 70 years old or because of chemotherapy surgery and complications after intolerance;
2. The vagus nerve invasion or invasion of adjacent organs or confirmed the presence of distant metastasis;
3. Have a history of abdominal surgery or chemotherapy before surgery;
4. The recent cardiovascular hemorrhagic or ischemic disease;
5. The amount of abnormal glucose tolerance or diabetes;
6. Not suitable for robotic surgery, such as body short that mechanical arm can not have enough activity range;
7. The history of biliary calculi or gastrointestinal dysfunction;
8. The other is not suitable for receiving robot surgery;
9. Participated in other clinical studies in the last month;
10. Other researchers not suitable for participation in the study of (HIV infection and intravenous drug addict), or other effects of this clinical study results analysis of the situation.