Certified Clinical Hemodialysis Technician (CCHT) Practice Exam 2025 - Free CCHT Practice Questions and Study Guide

The hematocrit test accurately measures the concentration of red blood cells in the blood. This test is vital for assessing a patient’s ability to carry oxygen, as red blood cells are responsible for this function. The result is expressed as a percentage of the total blood volume made up by red blood cells. A high or low hematocrit level can provide important insights into a person's health, hinting at conditions such as anemia, dehydration, or polycythemia.

In contrast, the other options refer to different aspects of blood composition. The concentration of white blood cells pertains to the immune system and its functionality, while the amount of hemoglobin is specifically related to the oxygen-carrying capacity within the red blood cells. Overall blood volume, while significant, does not provide the specific insights that hematocrit offers regarding red blood cell concentration. Understanding these distinctions is key for anyone involved in patient care or clinical assessments in hemodialysis and related fields.