pulse-free flow

例句：

1. 1. The patient's pulse-free flow was monitored closely during the operation.
   在手术期间，患者无脉血流被密切监测。
2. 2. The researcher found that the pulse-free flow of blood could be a significant factor in heart disease.
   研究者发现，无脉血流可能是心脏病的一个重要因素。
3. 3.The surgeon used a special device to maintain the patient's pulse-free flow during the procedure.
   外科医生使用一种特殊的设备来维持患者的无脉血流状态。