Canadian family physician Médecin de famille canadien
-
The hemostatic system consists of the subcutaneous tissue/vessel wall/platelet system and the coagulation cascade. Hemostasis occurs initially through the interaction between circulating platelets and subendothelial collagen, so that a platelet plug is formed. ⋯ The presence of the fibrin in the plug results in permanent hemostasis. The five tests of hemostasis - platelet count, bleeding time, partial thromboplastin time, prothrombin time and Factor XIII assay - are described.