Such mechanical prostheses will last indefinitely from a structural standpoint, but the patient requires continuing anticoagulation because of the exposed non-biologic surfaces.
此种瓣膜寿命长，但病人需要连续抗凝治疗，因为暴露的非生物性瓣膜的表面。
2
Besides the biologic thermal effect the instrument can also produce non-thermal effect, which is more important. The reasonable distance between human body and the radiant is about30 cm.
本仪器治病除利用生物热效应外，更主要的是非热效应，辐射源离人体的距离在30厘米最合理。
3
Therefore low dose naltrexone offers a non-toxic and efficacious biologic pathway-related treatment that may benefit patients with this ovarian cancer.