open a block meaning in English

打开分程序

Stents are wire mesh tubes that surgeons use to prop open a blocked artery
最开始外科医生使用金属网管来扩张堵塞的动脉。
Opening a blocked artery with balloons and stents can be lifesaving in the early hours after a heart attack , but a new study concludes that it often does no good if the heart attack occurred more than 25 hours ago
在心脏病发作的前几个小时内，通过充气囊和使用心脏支架以打开动脉可以拯救生命,但一项新研究表明,如果心脏病发作时间超过25小时后,这样做是没有任合益处的