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Disordered secondary haemostasis typically causes haemorrhage into joints and body cavities. Haemothroax, haemoperitoneu, or haemoarthrosis may cause dyspnoea, abdominomegaly or joint swelling and lameness. Although subcutaneous and intramuscular haemorrhages occur, intact primary haemostasis prevents minor capillary bleeding (petechiae and ecchymoses). Disorders of secondary haemostasis typically present with large bleeds and "rebleeding".
 
Disordered secondary haemostasis typically causes haemorrhage into joints and body cavities. Haemothroax, haemoperitoneu, or haemoarthrosis may cause dyspnoea, abdominomegaly or joint swelling and lameness. Although subcutaneous and intramuscular haemorrhages occur, intact primary haemostasis prevents minor capillary bleeding (petechiae and ecchymoses). Disorders of secondary haemostasis typically present with large bleeds and "rebleeding".
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patients with abnormalities of either primary or secondary haemostasis may show external haemorrhage such as epistxis, haematemesis, melaena and haematuria.. Sever blood loss may cause hypovolaemia and/or anaemia. Small volumes of blood within a sensitive location (for example, the brain, eyes. spinal cord or pericardial sac) can cause dramatic clinical signs. Many patients with haemostatic defects, however, can appear to be stable or clinically normal.
    
==Tests Evaluating Primary Haemostasis==
 
==Tests Evaluating Primary Haemostasis==
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