An 8-year-old boy has been diagnosed with hemophilia. Which of the following diagnostic blood studies is characteristically abnormal in this disorder?

The correct answer is A. Partial thromboplastin time. (A) Partial thromboplastic time measures activity of thromboplastin, which depends on the intrinsic clotting factors deficient in children who are hemophiliacs. (B) Platelet counts are normal in hemophilia. (C) Hemophilia does not affect the complete blood count. (D) Bleeding…

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Question

Options

APartial thromboplastin time
BPlatelet count
CComplete blood count
DBleeding time

How the community answered

(63 responses)

A
92% (58)
B
5% (3)
C
2% (1)
D
2% (1)

Explanation

(A) Partial thromboplastic time measures activity of thromboplastin, which depends on the intrinsic clotting factors deficient in children who are hemophiliacs. (B) Platelet counts are normal in hemophilia. (C) Hemophilia does not affect the complete blood count. (D) Bleeding times are normal in hemophiliacs. They measure the time interval for the bleeding from small superficial wounds to cease.

Topics

#hemophilia#coagulation studies#partial thromboplastin time#pediatric hematology

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