Clinical trial: NCT03500471
Section: Confidentiality
Subsections: 7、Is Personal Information Confidential?

Your medical records (surgical records, examination results, etc.) will be completely kept in the hospital.  
The doctor will record the test results on your medical record. The surgeon and ethics committee will be allowed to access your medical records. Any public report on the results of this clinical study will not disclose your personal identity. We will make every effort to protect the privacy of your personal medical data to the extent permitted by law.
Clinical trial: NCT03500471
Section: Participant Responsibilities
Subsections: 3、What Will You Do If Participate In A Clinical Study?

1.A total of 150 people will be included in this study for 3 years. Before you are enrolled in the clinical study, the doctor will ask and record your medical history, and perform blood routine examination, Blood biochemistry, Serum tumor markers, gastroscopy, upper abdominal CT and other examinations. If you meet the inclusion and exclusion criteria, you may voluntarily participate in the clinical study and sign an informed consent form.  
If you do not wish to participate in the clinical study, we will treat you as you wish.  
2. If you volunteer to participate in the clinical study, you will follow the following steps:
1) You have accepted our initial screening after admission and are a candidate for inclusion in this clinical study. We will inform you and your family members of the details of this clinical study in detail and answer all your questions. Please sign the informed consent for this clinical study after you confirm that you are fully informed of all the contents of this clinical study.  
2) At the same time, you will be asked to fill in detailed personal information. We will make every effort to protect the privacy of your personal information within the scope permitted by law.  
3) According to the medical operation routine, decide whether to adopt robotic-assisted radical gastrectomy or laparoscopic radical gastrectomy according to your will. You and your family will be informed and signed the informed consent for surgery.  
4) After the operation, we will carefully observe and record your recovery, and inform you or your family members of your condition in time. At the same time, we also need your cooperation to complete some necessary examinations.  
5) After the operation, we will further determine whether you will receive chemotherapy according to the pathological diagnosis. During this period, we will carefully observe and record your various symptoms and signs, and actively deal with your various post-chemotherapy discomfort.  
6) Postoperative follow-up plan: The first follow-up will be conducted 1 month after the operation. The follow-up doctor will perform physical examination, and the related laboratory tests mainly include blood routine examination, Blood biochemistry, Serum tumor markers, etc. If necessary, upper abdominal enhanced CT examination, chest X-ray examination, gastroscopy examination, etc. At the same time, the postoperative quality of life was assessed by international standards EORTC QLQ-C30 V 3.0 and EORTC QLQ-STO22.  
3. Other matters that require your cooperation You should go to the hospital according to the appointment of the doctor and you (during the follow-up period, the doctor may call or visit you to learn about your situation).Your follow-up is important because your doctor will determine whether the treatment you are receiving is really working and will guide you in a timely manner.  
If you need additional treatment, please contact your doctor.
Clinical trial: NCT03500471
Section: Purpose of Research
Subsections: 1、Clinical Background And Purpose

1.1 **Current status of disease treatment:** Although many advances have been made in treatment, radical surgery is still the main treatment method for the gastric. At present, total gastrectomy with D2 Lymphadenectomy is the standard surgical method for advanced gastric cancer such as upper stomach and esophagogastric junction carcinoma. The surgical methods can be divided into open surgery and minimally invasive surgery. Minimally invasive surgery has the advantages of less trauma, less bleeding, less postoperative pain, faster recovery, less complications and so on. It has been widely used at home and abroad and achieved good clinical results. Minimally invasive surgery includes laparoscopic surgery and robotic surgery.  
1.2 **Objective:** In this study, A prospective cohort study was conducted to compare and observe the differences between robotic-assisted radical gastrectomy and laparoscopic surgery for advanced gastric cancer in terms of surgical efficacy and postoperative complications. Therefore, the safety and efficacy of the operation were evaluated scientifically, providing evidence based medicine for its extensive development.  
1.3 **Your current treatment options:** Radical gastrectomy is the main method for the treatment of advanced gastric cancer, and the surgery should meet the requirements of D2 radical gastrectomy. At present, the minimally invasive surgical methods you can choose include robotic-assisted D2 radical gastrectomy and laparoscopic D2 radical gastrectomy.  
2、**Who should not participate in a clinical study**
1.Patients with early gastric cancer; 2.Age<18 years or Age>80 years; 3. radical total gastrectomy with D2 Lymphadenectomy is not required; 4..Enlarged or bulky regional lymph node (diameter over 3cm) supported by preoperative imaging including those surrounding important vessels 5.Emergency surgery due to complication (bleeding, obstruction or perforation) caused by gastric cancer Previous upper abdominal surgery (except laparoscopic cholecystectomy) 6.Previous neoadjuvant chemotherapy or radiotherapy 7.Unstable myocardial infarction, angina, or cerebrovascular accident within the past 6 months 8.FEV1<50% of predicted values 9.Other malignant diseases
Clinical trial: NCT03500471
Section: Voluntary Participation
Subsections: 68754167. If You Have Any Questions About Your Rights And Interests To Participate In This Study, You Can Consult The Ethics Committee Of Southwest Hospital Of China At (023) 68754814. 9、Voluntarily Choose To Participate In Clinical Research And Withdraw From Clinical Research

Whether to participate in the clinical study depends entirely on your wishes. Participation in this study will not have any therapeutic impact on you. You may refuse to participate in this clinical study or withdraw at any time during the clinical study, which will not affect the relationship between you and the doctor, nor will it affect the loss of your medical treatment or other interests.  
For your best interests, the doctor or surgeon may suspend you from continuing to participate in the clinical study at any time during the clinical study.  
This test will be aborted or withdrawn if::