An Economic Study of HSK21542 Injection for Prevention of Postoperative Nausea and Vomiting

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• History or evidence of any of the following diseases prior to screening:Respiratory diseases: severe chronic obstructive pulmonary disease, acute exacerbation of chronic obstructive pulmonary disease, severe airway stenosis, large pharyngolaryngeal mass, (broncho) tracheoesophageal fistula or airway tear, and serious respiratory tract infection within 2 weeks prior to screening; Central nervous system disorders: subjects with epilepsy, Parkinson's disease, or other central nervous system diseases causing nausea and vomiting, such as craniocerebral injury, intracranial space-occupying lesions, intracranial aneurysms, etc.; Cardiovascular diseases: subjects with uncontrolled hypertension [systolic blood pressure (SBP) ≥170 mmHg and/or diastolic blood pressure (DBP) ≥105 mmHg without treatment with antihypertensive medication, or SBP ≥160 mmHg and/or DBP ≥100 mmHg after treatment with antihypertensive medications], serious cardiac insufficiency ( the New York Heart Association [NYHA] Grade III-IV), unstable angina pectoris, acute myocardial infarction, severe arrhythmia, history of tachycardia/bradycardia requiring medical treatment, Grade II-III atrioventricular block (excluding pacemaker use) within 6 months prior to screenin; Digestive disorders: subjects with intestinal obstruction or other digestive diseases that may cause nausea and vomiting as judged by the investigator; Patients with a confirmed diagnosis of vestibular function disorder, excluding travel sickness (including but not limited to peripheral vestibular syndrome, central vestibular syndrome, etc.); Subjects with a history of significant and chronic dizziness.
• Any of the following medications or treatments have been used at screening:Subjects who have received antiemetics/medications with antiemetic effects within 24 h before the start of surgery or who have used antiemetics/drugs with antiemetic effects before the start of surgery for no more than 5 half-lives (calculated as the longest time); Subjects with neoplasm malignant treated with chemotherapy within 4 weeks prior to screening;
• Laboratory test indicators at screening meet the following criteria:White blood cell count < 3.0 × 109/L;Platelet count < 80 × 109/L;Hemoglobin< 70 g/L;Prolongation of prothrombin time (PT) exceeding the upper limit of normal for 3 seconds;Prolongation of activated partial thromboplastin time (APTT) exceeding the upper limit of normal for 10 seconds;Alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) > 3 × ULN;Total bilirubin > 2 × ULN;Blood creatinine > 2 × ULN;Fasting serum glucose≥ 11.1 mmol/L;
• Subjects anticipated to require continued endotracheal intubation after the end of surgery;
• Subjects anticipated to require the insertion of nasal or oral gastric tubes after the end of surgery;
• Subjects with a history of serious drug allergies or those allergic to the investigational drugs specified in the protocol;