Clinical Research Directory

Inclusion Criteria: 1. Patients preoperatively diagnosed with resectable gastric cancer 2. Patients without distant organ metastasis 3. Patients with preoperative Overnight Cardiorespiratory Sleep Testing (OCST) or Polysomnography (PSG) results showing Apnea-Hypopnea Index (AHI) \>30 events/hour and SaO₂ \<80% 4. Patients with cardiopulmonary function deemed suitable for surgery 5. Patients aged 18-85 years 6. Patients who voluntarily joined this study and provided written informed consent Exclusion Criteria: 1. Patients with a history of or concurrent other malignant tumors 2. Patients who underwent palliative resection 3. Subjects who experienced acute cardiovascular or cerebrovascular events (e.g., acute cerebral infarction, acute coronary syndrome) within the past 3 months, or whose cardiovascular clinical symptoms/diseases are not well-controlled 4. Patients with a history of psychotropic drug abuse that cannot be abstained, or those with psychiatric disorders 5. Patients with concomitant diseases that, in the investigator's judgment, seriously endanger the patient's safety or affect the completion of the study