Robotic Resection for Patients With Gastric Gastrointestinal Stromal Tumors: a Single-center Study

Inclusion Criteria: 1. Requirements of informed consent and assent of participant, parent or legal guardian as applicable. 2. Patients with gastric gastrointestinal stromal tumors scheduled for robotic resection and between the age of 18 and 80 years old without considering sex. 3. American Society of Anesthesiologists (ASA) physical status I-III. 4. Participants can follow the visit plan. Exclusion Criteria: 1. Patients certified by a doctor that doesn't fit to participate in this study. 2. Patients with ischemic heart disease, cerebrovascular disease and peripheral vascular disease, or their cardiac function \> II (NYHA) patients, patients received coronary artery bypass grafting (CABG) recently, and patients with severe hypertension (systolic pressure≥180mmHg or diastolic pressure≥110mmHg). 3. Patients with gastrointestinal stromal tumor with distant metastasis. 4. Patients with severe infection, respiratory dysfunction, coagulation disorders, severe liver and renal dysfunction (Child - Pugh≥ 10; creatinine clearance \< 25 ml/min). 5. Patients with gastrointestinal operations and complicated abdominal operations. 6. Patients with severe malnutrition (albumin≤30g/L, weight loss in half a year\>10%, Subjective Global Assessment (SGA) classification C, body mass index \<18, Hb\<70g/L). 7. Pregnancy and lactation women, or have a pregnancy plan within a month after the test of the subjects (also including male participants). 8. Patients participated other subjects 3 months before this subject. 9. Sponsors or researchers directly involved in the testing or their family members.