Septic thrombosis is a very serious condition that can be very damaging and must be examined early. So what are the common tests for this disease? 1.Activated partial thromboplastin time (APTT) Activated partial thromboplastin time is a more sensitive screening test for endogenous coagulation system. 2.Plasma heparin content measurement Plasma heparin content measurement is the determination of free heparin in the plasma of patients on hemodialysis and anticoagulation therapy, and dynamic detection of changes in free heparin and coagulation factors in the plasma of patients on anticoagulation therapy. The determination of plasma heparin levels ensures the efficacy of heparin and reduces the risk of bleeding, and allows for laboratory monitoring. The determination of plasma heparin content generally includes the determination of heparin coactivator II activity and the determination of low molecular heparin (LMWH). 3. Thrombosis and hemostasis tests Thrombosis and hemostasis tests include capillary fragility test, bleeding time determination, platelet count, clot contraction test, clotting time determination, plasma prothrombin time determination and activated partial thromboplastin time determination. Of these tests, the first four primarily reflect the role of the vessel wall and platelets in thrombosis and hemostasis. The remaining three are tests to examine endogenous coagulation, with the activated partial thromboplastin time assay being the most sensitive. 4.Bacteriological examination of pus and trauma infection specimens Pus and trauma secretions are the most common in the process of infection. Bacterial culture of pus and trauma secretion is used for the diagnosis of pathogenic bacteria. There are two sources of pathogenic bacteria in pus and trauma secretion bacteria: exogenous and endogenous. There are many types of bacteria that can be detected from pus and trauma secretions, and the most preferred pathogenic bacteria are Staphylococcus aureus and Streptococcus pyogenes, followed by Pseudomonas, Enterobacteriaceae, etc. Specimens were collected and tested with three procedures: direct smear, common bacterial culture and anaerobic culture. 5. 3.8S α2-glycoprotein 3.8S α2-glycoprotein is also known as histidine-rich glycoprotein (HRG) because it contains a large number of histidine residues in its amino acid composition. It is mainly bound to heparin in the body and has regulatory effects on coagulation, fibrinolysis and immune function. It can also bind small amounts of heme and bilirubin, and is a multifunctional protein. HRG is synthesized in hepatocytes and can be used as an indicator to monitor the occurrence and development of graft-versus-host.