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.

凝血酶原（PT）时间和部分凝血活酶（PTT）时间均会延长，两者都反映出血液循环中低水平的凝血因子。