凝血酶原时间 (ＰＴ)测定是临床最常用的反映外源凝血系统的观察指标 ,主要用于判断肝实质病变情况。 1996年以来 ,我们收集了住院的肝炎和肝硬化病人的ＰＴ测定结果 ,并与正常人相比较 ,报告如下。1　资料与方法1 1　资料　本院传染科住院 36 0例 ,其中肝炎 2 2 3例 ,肝硬化 1 Prothrombin time (PT) determination is the most commonly used clinical observation of foreign coagulation system indicators, mainly for the determination of liver parenchymal disease. Since 1996, we have collected the PT results of hospitalized patients with hepatitis and cirrhosis and compared them to normal subjects, the report of which is as follows. 1 Materials and Methods 1 1 Materials In-hospital Infectious Diseases 36 0 cases, of which 223 cases of hepatitis, cirrhosis of the liver 1