A 67-year-old man in previously good health is hospitalized because of a 2-day history of fever and diminished consciousness. The patient responds inconsistently to verbal commands. His temperature is 39.5 C (103.1 F); he has tachycardia, and his blood pressure is 80/58 mm Hg. There is no bleeding. His hemoglobin is 12.1 g/dL, leukocyte count is 29,000/ L with 80% neutrophils, and platelet count is 20,000/ L. Which of the following studies should be obtained in this patient?

Bone marrow aspiration and biopsy

Measurement of platelet-associated IgG

Measurements of fibrin D-dimer and total fibrinogen

A 67-year-old man in previously good health is hospitalized because of

1.	A 67-year-old man in previously good health is hospitalized because of a 2-day history of fever and diminished consciousness. The patient responds inconsistently to verbal commands. His temperature is 39.5 C (103.1 F); he has tachycardia, and his blood pressure is 80/58 mm Hg. There is no bleeding. His hemoglobin is 12.1 g/dL, leukocyte count is 29,000/ L with 80% neutrophils, and platelet count is 20,000/ L. Which of the following studies should be obtained in this patient?
A.	Bone marrow aspiration and biopsy
B.	Factor VIII level
C.	Measurement of platelet-associated IgG
D.	Measurements of fibrin D-dimer and total fibrinogen
E.	Bleeding time
Answer» E. Bleeding time

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