The succinylated gelatin electrolyte sodium acetate injection (specification: 500 mL: 20 g) developed and produced by Nanjing Chia-tai Tianqing Pharmaceutical. is used as the experimental drug, and the succinylated gelatin electrolyte sodium acetate injection (trade name: Jialeban) produced and licensed by Braun Medical (Suzhou) Co., Ltd ®； Specification: 500 mL: 20 g) is used as a control drug to evaluate the clinical equivalence of two formulations in patients planning elective surgery by comparing the changes in stroke volume (SV) between 5 minutes after completion of ANH and immediately before the start of ANH.
Age range is 18 to 65 years old (including boundary values), with no gender restrictions.
Weight not less than 50 kg, weight not more than 100 kg, body mass index [BMI=weight (kg)/height 2 (m2)] within the range of 19.0~30.0 kg/m2 (including critical values).
Planned elective surgery with an estimated duration of less than 6 hours.
The expected ANH blood collection volume is 10% to 15% of the total blood volume.
Individuals with a history of severe cerebrovascular disease or severe mental illness, who have been deemed unsuitable by the researchers to participate in this trial.
Previous indications include heart valve disease, aortic stenosis, and severe peripheral vascular disease (such as a history of arteriosclerosis), and the researchers have determined that they are not suitable to participate in this trial.
Suffering from serious heart diseases, including but not limited to unstable angina, cerebrovascular accidents or transient ischemic stroke (within 6 months before screening), myocardial infarction (within 6 months before screening), New York Heart Association (NYHA) classification ≥ III, congestive heart failure, severe arrhythmia with poor drug control, requiring mechanical maintenance (such as pacemakers), placing heart stents or abnormal results of echocardiography and/or 12 lead electrocardiogram during screening, has clinical significance.
Patients with hypertension have poor blood pressure control (SBP ≥ 160mmHg and/or DBP ≥ 100mmHg), and cannot discontinue long-term antihypertensive drugs such as angiotensin-converting enzyme inhibitors/angiotensin II receptor antagonists and potassium sparing diuretics 10 hours before surgery, and the researchers have determined that they are not suitable to participate in this trial.