A 62-year-old man with chronic atrial fibrillation has been treated with warfarin. He has no other chronic illnesses and is receiving no other medications long-term except for lipid-lowering agents. Results of his complete blood cell count and tests of renal and kidney function are normal. He checks his prothrombin time monthly and has kept the international normalized ratio (INR) within the therapeutic range (2-3) for the duration of his therapy with warfarin. He has heard about recent US Food and Drug Administration (FDA) approval of dabigatran, which requires no monitoring, and he would like a prescription for this new drug. Which of the following statements is true about the use of dabigatran in atrial fibrillation compared with the well-managed use of warfarin?

A 62-year-old man with chronic atrial fibrillation has been treated with warfarin. He has no other chronic illnesses and is receiving no other medications long-term except for lipid-lowering agents. Results of his complete blood cell count and tests of renal and kidney function are normal. He checks his prothrombin time monthly and has kept the international normalized ratio (INR) within the therapeutic range (2-3) for the duration of his therapy with warfarin. He has heard about recent US Food and Drug Administration (FDA) approval of dabigatran, which requires no monitoring, and he would like a prescription for this new drug. Which of the following statements is true about the use of dabigatran in atrial fibrillation compared with the well-managed use of warfarin?

A 5-year-old white female has multiple bruises on her lower extremities and oral mucosal bleeding of 3 days' duration. Two weeks before these signs, she had a mild respiratory tract infection. Physical examination reveals multiple ecchymoses and petechiae; no lymphadenopathy or hepatosplenomegaly is noted. The next diagnostic step is

A 5-day-old full-term male presents with intense cyanosis, tachypnea, and tachycardia. Physical examination reveals cyanosis of the skin and mucous membranes; the lungs, heart, pulses, and general examination show no abnormalities. Arterial blood gas determination reveals a PaOâ‚‚ of 95 while the patient is breathing room air and an oxygen saturation of 40%. The most likely diagnosis is

Matching: Hemolytic anemia - Microcytosis

Matching: Anemia - Copper deficiency