Practice Quiz

CCRN Nursing Exam Prep - Adult Critical Care

Category - Medical Surgical

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Mr. Sanchez visited a clinic for his timely medical check-up and brought with him his hematology result. He informed the nurse that his physician is trying to assess him for polycythemia vera. The laboratory findings for a client with polycythemia vera include major and minor criteria. What is the major or defining hematological finding?
  1. Leukocytosis >12,000/mm3
  2. Thrombocytosis >400,000/mm3
  3. RBC count >6 million/mm3
  4. Elevated leukocyte alkaline phosphatase
Explanation
Answer - C - Polycythemia vera is a chronic myeloproliferative disorder characterized mainly by erythrocytosis (increased RBC mass). Hemoglobin and hematocrit will be elevated. Choices A, B, and D are also laboratory findings, but they are considered minor criteria in this condition.
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