National Telemetry Association Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What does the hematocrit measure in the blood?

Percentage of white blood cells

Percentage of plasma in the blood

Percentage of red blood cells

The hematocrit measures the percentage of red blood cells in the blood. This value is crucial in assessing a person's overall health and can provide insights into conditions such as anemia, dehydration, and various other medical conditions. A higher hematocrit percentage may indicate dehydration or other conditions that elevate red blood cell production, while a lower percentage may suggest anemia or a decrease in red blood cell production.

The measurement is typically obtained through a blood test, where the blood sample is centrifuged to separate its components. The proportion of red blood cells relative to the total blood volume is then calculated, which establishes the hematocrit level. Understanding hematocrit is vital for monitoring and diagnosing various health issues effectively.

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Percentage of platelets

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