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→Disorders of Haemostasis
Patients with defective primary haemostasis typically present with pinpoint (petechial) haemorrhages affecting the skin and mucous membrane bevause plateles fail to deal even tiny capillary defects. Petechiae often merge into small, flat bruises called ecchymoses. Ocular haemorrhage (conjunctival, scleral, iridial and retinal petechiae, and hyphaema) is common. Intact secondary haemostasis often prevents major haemorrhage. Disorders of primary haemostasis typically prevents with multiple minor bleeds and prolonged bleeding.
Patients with defective primary haemostasis typically present with pinpoint (petechial) haemorrhages affecting the skin and mucous membrane bevause plateles fail to deal even tiny capillary defects. Petechiae often merge into small, flat bruises called ecchymoses. Ocular haemorrhage (conjunctival, scleral, iridial and retinal petechiae, and hyphaema) is common. Intact secondary haemostasis often prevents major haemorrhage. Disorders of primary haemostasis typically prevents with multiple minor bleeds and prolonged bleeding.
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".
==Tests Evaluating Primary Haemostasis==
==Tests Evaluating Primary Haemostasis==