生-老-病-死是人们无法改变的自然发展规律,人们唯一能做到的就是研制相应的药物和医疗器械、利用药物或手术的方法去治疗和修复重建病、老及受伤的机体,从而使人们的健康得到恢复、生活质量得到提高、寿命得到延长;因此药物和医疗器械是与人们生命健康密切相关、不可缺少的器物。医疗器械包括人工心瓣、人工血管、皮肤、角膜、关节、骨,以及齿科、缝合、人工器官和修复矫正等体内(in vivo)植入器械;人工胃、肺、擦管、透析器、透析膜、接触眼镜等一般在体外应用,但应用时会与人体的呼 Health - old - sick - death is a natural law of development that people can not change, the only thing people can do is to develop appropriate drugs and medical devices, the use of drugs or surgical methods to treat and repair the reconstruction of sick, old and injured body, So that people’s health is restored, the quality of life is improved, life expectancy is extended; therefore, drugs and medical devices are closely related to people’s lives and health, an indispensable artifact. Medical devices include prosthetic heart valves, artificial blood vessels, skin, corneas, joints, bones, and in vivo implants such as dental, sutures, prostheses and prostheses; artificial stomach, lungs, Dialysis membrane, contact lenses and other general in vitro applications, but when used with the human body call