What is the primary defect in Hemophilia A?
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Coagulation pathway defects causing bleeding disorders, their diagnosis, and treatment options.
Mastering this deck will enhance your understanding of bleeding disorders, enabling accurate diagnosis and effective management of conditions like hemophilia and von Willebrand disease in clinical practice, thereby improving patient outcomes.
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| # | Front | Back | Hint |
|---|---|---|---|
| 1 | What is the primary defect in Hemophilia A? | Hemophilia A is caused by a deficiency or dysfunction of clotting factor VIII. | Think 'A' for VIII |
| 2 | Which clotting factors are deficient in Hemophilia B? | Factor IX deficiency. | B for 'IX' |
| 3 | What is the inheritance pattern of Hemophilia? | X-linked recessive inheritance, primarily affecting males with carrier females. | X-linked means primarily males affected |
| 4 | Describe the typical bleeding presentation in Hemophilia. | Spontaneous hemarthroses, deep tissue bleeding, prolonged bleeding after trauma or surgery. | Think joint bleeds |
| 5 | What laboratory test is most useful for diagnosing Hemophilia? | Prolonged activated partial thromboplastin time (aPTT) with normal prothrombin time (PT). | aPTT prolonged in intrinsic pathway defects |
| 6 | How is Hemophilia typically managed? | Replacement therapy with recombinant or plasma-derived clotting factor concentrates. | Think 'factor replacement' |
| 7 | What is Von Willebrand Disease? | A bleeding disorder caused by deficiency or dysfunction of von Willebrand factor (VWF), which mediates platelet adhesion and carries factor VIII. | VWF = von Willebrand factor |
| 8 | Name the most common type of Von Willebrand Disease. | Type 1, characterized by partial quantitative deficiency of VWF. | Type 1 is mild and most common |
| 9 | What laboratory findings support a diagnosis of Von Willebrand Disease? | Low VWF antigen and activity levels, reduced ristocetin cofactor activity, and sometimes mildly decreased factor VIII. | VWF levels are key |
| 10 | How is Von Willebrand Disease treated? | Desmopressin (DDAVP) for mild cases, VWF-containing factor concentrates for severe cases. | Think 'DDAVP' for mild cases |
| 11 | What is the role of desmopressin in treating Von Willebrand Disease? | It stimulates release of stored VWF and factor VIII from endothelial cells, increasing their plasma levels. | Desmopressin boosts VWF |
| 12 | Differentiate between Hemophilia A and Von Willebrand Disease in terms of pathophysiology. | Hemophilia A is a deficiency of factor VIII; Von Willebrand Disease involves deficiency or dysfunction of VWF, which carries factor VIII and mediates platelet adhesion. | VWF links platelets and factor VIII |
| 13 | Which bleeding disorder often presents with mucocutaneous bleeding, such as easy bruising and epistaxis? | Von Willebrand Disease. | Mucocutaneous bleeding is characteristic |
| 14 | Why is aPTT prolonged in Hemophilia? | Because factor VIII and IX are part of the intrinsic pathway, and their deficiency prolongs aPTT. | Intrinsic pathway factors |
| 15 | What is a common complication of untreated severe Hemophilia? | Development of target joints due to recurrent hemarthroses, leading to chronic joint damage. | Joint bleeding leads to damage |
| 16 | Name a laboratory test that distinguishes Hemophilia from platelet disorders. | aPTT is prolonged in Hemophilia, whereas platelet disorders usually have normal coagulation times. | Coagulation times help differentiate |
| 17 | What are inhibitors in the context of Hemophilia treatment? | Antibodies developed by the patient against infused clotting factor, reducing treatment effectiveness. | Inhibitors block therapy |
| 18 | How can bleeding episodes be prevented in patients with Hemophilia? | Prophylactic infusion of clotting factor concentrates on a regular schedule. | Prophylaxis prevents bleeds |
| 19 | What is the significance of a family history in diagnosing Hemophilia? | It suggests a hereditary X-linked pattern, increasing suspicion in males with bleeding tendencies. | Family history clues |
| 20 | Which laboratory test result would suggest a diagnosis of Hemophilia B? | Prolonged aPTT with normal PT, similar to Hemophilia A, but with factor IX deficiency on specific assays. | Factor IX assay confirms |
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