American Medical Certification Association (AMCA) Phlebotomy Practice Exam

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What does hemoconcentration refer to?

  1. Increased concentration of cells and solids in the blood

  2. Decreased volume of plasma in the blood

  3. Normal distribution of blood components

  4. Increased fluid levels in the blood

The correct answer is: Increased concentration of cells and solids in the blood

Hemoconcentration refers to an increased concentration of cells and solids in the blood, which occurs when there is a decrease in plasma volume relative to the cellular components of the blood. This phenomenon can be caused by various factors, such as dehydration, prolonged tourniquet application, or significant fluid loss from conditions like sweating or bleeding. When hemoconcentration occurs, the ratio of red blood cells, white blood cells, and platelets to plasma becomes elevated, leading to potential alterations in laboratory test results and overall blood composition. This concept is crucial for phlebotomists and healthcare professionals to understand, as the presence of hemoconcentration can impact diagnostic tests, potentially leading to misinterpretation of a patient's health status. Monitoring and recognizing hemoconcentration can guide proper blood sample collection techniques and ensure accurate laboratory analyses.

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