Comparison of Partial Stomach-Partitioning and Conventional Gastrojejunostomy for the Treatment of Gastric Outlet Obstruction in Advanced Gastric Cancer

Inclusion Criteria: 1.Patients and their families were fully aware of this study and voluntarily signed informed consent ; 2.Age 18-75 years old ( including 18 and 75 years old ) ; 3.Distal gastric cancer ( cT4bN + M0 / T3-4N + M1, stage IV ) with locally unresectable, distant metastasis or peritoneal metastasis confirmed by pathology and unable to undergo radical surgery ; 4.Complicated with digestive tract obstruction ( gastric retention confirmed by upper gastrointestinal radiography or gastroscopy, and GOOSS score ≤ 1 ) ; the ECOG score was 0-2 points, and there was no deterioration within 7 days ; 6.ASA score I-III ; 7.No previous anti-tumor therapy ( such as radiotherapy, chemotherapy, targeted therapy, immunotherapy, etc. ) : The functions of important organs meet the following requirements : (a) absolute neutrophil count ≥ 1.5 × 109 / L, white blood cell count ≥ 4.0 × 109/L; （b) Platelet ≥ 100 × 109 / L ; （c) Hemoglobin ≥ 60g / L ; （d) TBIL ≤ 1.5 times ULN ; （e) ALT and AST ≤ 2.5 times ULN ; （f) urea / urea nitrogen ( BUN ) and creatinine ( Cr ) ≤ 1.5 × ULN ( and creatinine clearance rate ( CCr ) ≥ 50mL / min ) ; （g) Left ventricular ejection fraction ( LVEF ) ≥ 50 % ; the corrected QT interval ( QTcF ) by Fridericia method was less than 470 ms. （i) INR ≤ 1.5 × ULN, APTT ≤ 1.5 × ULN. 9. women of childbearing age need to take effective contraceptive measures ; 10.No other surgical contraindications ; 11.good compliance, with follow-up. Exclusion Criteria: 1. Unable to comply with the research program or research procedures ; 2. Patients with other malignant tumors within 5 years before enrollment, except for basal cell or squamous cell carcinoma of the skin after radical resection, or cervical carcinoma in situ ; 3. Patients with active autoimmune diseases or a history of autoimmune diseases within 4 weeks before enrollment ; 4. Previously received allogeneic bone marrow transplantation or organ transplantation ; 5. Cardiovascular diseases with significant clinical significance, including but not limited to acute myocardial infarction, severe / unstable angina pectoris or coronary artery bypass grafting within 6 months before enrollment ; congestive heart failure New York Heart Association ( NYHA ) grade \> 2 ; ventricular arrhythmia requiring drug treatment ; lVEF ( left ventricular ejection fraction ) \< 50 % ; 6. Active or uncontrolled severe infection ( ≥ CTCAE V5.0 grade 2 infection ) ; 7. Known human immunodeficiency virus ( HIV ) infection. Patients with known clinical history of liver disease, including viral hepatitis \[ known as hepatitis B virus ( HBV ) carriers must be excluded from active HBV infection, that is, HBV DNA positive ( \> 1 × 104 copies / mL or \> 2000 IU / ml ) ; it is known that hepatitis C virus infection ( HCV ) and HCV RNA positive ( \> 1 × 103 copies / mL ) ; 8. pregnant ( pregnancy test positive before medication ) or breastfeeding women ; 9. Any other disease with clinically significant metabolic abnormalities, physical examination abnormalities or laboratory abnormalities, according to the judgment of the researchers, it is reasonable to suspect that the patient has a state that is not suitable for enrollment ( such as having seizures and requiring treatment ), or will affect the interpretation of the results of the study, or put the patient at high risk ; the researchers considered that the patients were not suitable for inclusion in this study.