vena-contracta

例句：

1. 1. During the surgery, the surgeon had to close the vena-contracta to prevent blood loss.
   在手术期间，外科医生必须关闭静脉收缩以防止出血。
2. 2. The patient's condition worsened as the vena-contracta became more constricted.
   随着静脉收缩变得更加狭窄，患者的病情恶化了。
3. 3.The doctor advised the patient to exercise regularly to maintain proper vena-contracta function.
   医生建议患者定期锻炼以保持正常的静脉收缩功能。