mechanical prosthetic valve

例句：

1. 1. The mechanical prosthetic valve was designed to replace the damaged heart valve.
   这个机械假体瓣膜被设计来替代受损的心脏瓣膜。
2. 2.The patient's condition improved significantly after the surgery, and he was discharged from the hospital on the 7th day.
   手术后，患者的病情显著改善，并于第7天出院。
3. 3. The prosthetic valve is a critical component of heart surgery, and its performance directly affects the patient's quality of life.
   人工瓣膜是心脏手术的关键部件，其性能直接影响患者的生活质量。