Clinical Study Between Robotic and Open Surgery in Patients With Pancreatic Cancer

Inclusion Criteria: * Diagnosed pancreatic ductal adenocarcinoma * Patients and their families volunteered to test and signed informed consent. Exclusion Criteria: * Preoperative exclusion: 1. Patients with metastasis (M1) 2. Patients with tumor recurrence 3. Patients with artery and/or vein invasion and can't perform radical resection and reconstruction 4. Patients with poor cardiopulmonary function cannot tolerate surgery; 5. receive neoadjuvant radiotherapy and chemotherapy before surgery; 6. The patient or family member refuses to join the group; 7. Pregnant patients * Intraoperative exclusion: 1. Intraoperative exploration of metastases in other parts besides the primary lesion 2. Other organs malignant tumors metastasize to the pancreas * Postoperative exclusion: 1. pathology confirmed non-pancreatic ductal adenocarcinoma