A patient has a very low platelet count. Which finding is most directly associated with impaired primary haemostasis?
Correct answer: A. Petechiae and bleeding from mucous membranes
- A. Petechiae and bleeding from mucous membranes
- B. Deep muscle bleeding with joint swelling
- C. Yellow skin from increased bilirubin
- D. Severe cyanosis from low oxygen saturation
Explanation
Platelets are essential for the initial platelet plug, so thrombocytopenia commonly causes petechiae and mucosal bleeding. Deep tissue and joint bleeding is more characteristic of some clotting-factor disorders.
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About Blood and Immunity
Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.
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