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The nurse is caring for a client admitted with bleeding tendencies. The physician suspects hemophilia. Which laboratory value supports the diagnosis? A. Prolonged aPTT B. Increased protime C. Abnormal fibrinogen level D. Increased platelet count

Short Answer

Expert verified
Answer: Prolonged aPTT.

Step by step solution

01

Understand Hemophilia

Hemophilia is a bleeding disorder in which the blood does not clot properly. This can lead to spontaneous bleeding as well as bleeding following injuries or surgery. Hemophilia is caused by a deficiency of specific clotting factors, mainly factor VIII (Hemophilia A) or factor IX (Hemophilia B). In the context of this question, we need to focus on which of these laboratory values reflects a deficiency in clotting factors.
02

Analyze each laboratory value

A. Prolonged aPTT (activated partial thromboplastin time): aPTT is a test that measures the time it takes for a blood clot to form. A prolonged aPTT indicates a deficiency in one or more clotting factors within the intrinsic and common clotting pathways, which include factors VIII and IX. This laboratory value can be associated with hemophilia. B. Increased protime (prothrombin time): Prothrombin time is a test that measures the time it takes for blood to clot. An increased protime indicates a deficiency of clotting factors within the extrinsic and common clotting pathways. Hemophilia is related to deficiencies in the intrinsic clotting pathway, so an increased protime does not support the diagnosis of hemophilia. C. Abnormal fibrinogen level: Fibrinogen is a protein in the blood that is essential for clot formation. Abnormal fibrinogen levels can be associated with bleeding disorders; however, hemophilia is specifically related to defects in factor VIII or IX, not fibrinogen. D. Increased platelet count: Platelets play a crucial role in clot formation, but an increased platelet count is not associated with hemophilia. Hemophilia is not a platelet disorder; it is a factor deficiency disorder.
03

Choose the correct laboratory value

After analyzing each laboratory value and their relationship with hemophilia, it is clear that the correct laboratory value that supports the diagnosis of hemophilia is: A. Prolonged aPTT.

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