Factor Xa, with Factor Va as a cofactor, turns factor II (also called prothrombin) into factor IIa or thrombin.

活性因子Xa和作为辅因子的因子Va将因子II（凝）转变为因子IIa（凝）。

Finally, an elevated or prolonged prothrombin time, which is the time it takes your blood to clot, is a typical lab finding in more severe cases.

最终，凝间延长，即凝固的间，也是更重自免肝病例的典型实验室指标。

Diagnosis of hemophilia A and B usually starts with lab tests including a platelet count which is usually normal, a prothrombin (PT) time, and a partial thromboplastic (PTT) time.

友病A和B的诊断通常是进行实验检测，包括小板计数（一般正常）、凝间（PT），以及部分凝活间（PTT）。

There is also a prolonged prothrombin (or PT) time, as well as prolonged partial thromboplastin time (or PTT), both of which reflect having lower levels of circulating coagulation factors.

凝（PT）间和部分凝活（PTT）间均会延长，两者都反映出循环中低水平的凝因子。

Plasma is the liquid part of the blood and consists of water, dissolved proteins, sugar, salts, hormones, and other substances. The four major plasma proteins are albumin, globulin, fibrinogen, and prothrombin.

浆是的体部分，由水，溶解的蛋白质，糖，盐，激素和其他物质组成。四种主要的浆蛋白是白蛋白，球蛋白，纤维蛋白和凝。