Clinical Research Directory

Inclusion Criteria:1: 1.18-80 years old adult, BMI\<27.9kg/m2 2: 2. American Society of Anesthesiologists ASA Grade I-III 3: 3. Patients with laparoscopic partial liver resection such as liver tumors 4: 4. Willing to participate in this study and sign the informed consent form \- Exclusion Criteria: 1. 1\. The patient or family member refuses to sign the informed consent form 2. 2\. Blood coagulation dysfunction, local infection 3. 3\. Those who have communication, communication disorders or mental abnormalities 4. 4\. Patients with severe heart, pulmonary and renal insufficiency or patients with central system diseases 5. 5\. For any reason, it cannot be matched with the study or the researcher believes that it is not appropriate to be included in this experiment. \-