Study Evaluating the Safety, Efficacy and Pharmacokinetics of SYH9089 Injection in Patients Undergoing Abdominal Surgery.

Exclusion criteria

• ✕. Patientss with poorly controlled blood pressure despite medication: systolic blood pressure ≥160 mmHg and/or diastolic blood pressure ≥100 mmHg; or systolic blood pressure \<90 mmHg;
• ✕. 12-lead ECG: QTcF ≥450 ms for males or ≥470 ms for females, or a history of severe arrhythmias such as second-degree type II or higher atrioventricular block, or a history of cardiac insufficiency;
• ✕. Coagulation function: PT \> ULN + 3 seconds and/or APTT \> ULN + 10 seconds;
• ✕. Liver function: ALT and/or AST ≥ 2 × ULN; TBIL ≥ 1.5 × ULN; ALB \< 30 g/L;
• ✕. Renal function: Cr ≥ 1.5 × ULN;
• ✕. PLT \< 80 × 10\^9/L;
• ✕. HGB \< 90 g/L;
• ✕. Random blood glucose \> 11.1 mmol/L. 13. Positive for HBsAg, HCV-Ab, HIV-Ab, or TP-Ab;; 14. Female subjects with a positive pregnancy test or who are breast feeding; fertile subjects who plan to become pregnant, are unwilling or unable to use effective contraception during the trial and within 3 months after administration, or who plan to donate sperm or ova; 15. Patients with a history of drug abuse, substance use, and/or alcoholism within 6 months prior to randomization, (alcoholism is defined as alcohol consumption exceeding 14 units per week:1 unit = 360 mL beer, or 45 mL spirits with 40% alcohol content, or 150 mL wine); 16. Patients who underwent major surgery within 3 months prior to randomization, or surgery that may significantly affect the in vivo metabolism of the investigational product or the evaluation of safety; 17. Patients with blood loss or blood donation exceeding 400 mL, or who received blood transfusion or blood products within 3 months prior to randomization; 18. Patients who participated in any clinical trial of drugs or medical devices within 3 months prior to randomization; 19. Any other conditions judged by the investigator to be unsuitable for participation in this trial.