When the patient's poor coagulation function leads to bleeding, it may be caused by the decrease of coagulation function. Coagulation factor testing is required. It is clear that the bleeding is caused by lack of coagulation factors or more anticoagulation factors. According to the cause, supplement the corresponding coagulation factors or fresh plasma. The presence of more clotting factors can help stop bleeding. Clinically, it can be detected whether the corresponding coagulation factors of the internal and extrinsic coagulation pathways of coagulation function are reduced or have dysfunction, and check whether the abnormal coagulation function is caused by the lack of coagulation factors or the function of coagulation factors, mainly including the following conditions:

1. Abnormal endogenous coagulation pathway: The main coagulation factor affecting the endogenous coagulation pathway is APTT. If APTT is prolonged, it means that there are abnormal coagulation factors in the endogenous pathway, such as factor 12, factor 9, factor 8, and common pathway 10. Factor deficiency can cause bleeding symptoms in patients;

2. Abnormal extrinsic coagulation pathway: if PT is prolonged, it can be detected that tissue factor, factor 5 and factor 10 in the common pathway may all be abnormal, that is, the decrease in the number leads to prolonged coagulation time and causes bleeding in the patient.