67. A 44-year-old man come to your office bringing his male infant who is bleeding . You suspected that the infant is having hemophilia. Which laboratory test will be abnormal and more indicative of the disease you suspected? A. Bleeding time B. Clot retraction test C. Partial thromboplastin time D. Hemoglobin level

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67. A 44-year-old man come to your office bringing his male infant who is bleeding . You suspected that the infant is having hemophilia. Which laboratory test will be abnormal and more indicative of the disease you suspected? A. Bleeding time B. Clot retraction test C. Partial thromboplastin time D. Hemoglobin level

Answer 1

The correct answer is C. Partial thromboplastin time.Hemophilia is a bleeding disorder that affects the blood's ability to clot properly. It is typically caused by a deficiency or dysfunction of certain clotting factors in the blood. The partial thromboplastin time (PTT) test is a laboratory test that measures the time it takes for a clot to form in a sample of blood. In individuals with hemophilia, the PTT test is usually prolonged, indicating a delay in the clotting process.Option A, bleeding time, measures the time it takes for a small puncture wound to stop bleeding. It is not specifically indicative of hemophilia.Option B, clot retraction test, assesses the ability of a blood clot to contract and condense after formation. It is not directly related to hemophilia.Option D, hemoglobin level, measures the amount of hemoglobin in the blood. Hemoglobin is a protein in red blood cells that carries oxygen. While low hemoglobin levels can indicate anemia or bleeding, they are not specific to hemophilia.Therefore, the laboratory test that would be abnormal and more indicative of hemophilia in this scenario is the partial thromboplastin time (PTT) test.

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