What component is primarily measured in the tests conducted using lavender tubes?

The component primarily measured in tests conducted using lavender tubes is the Complete Blood Count (CBC). Lavender tubes contain EDTA as an anticoagulant, which helps preserve the blood cells' integrity for accurate testing. The CBC is a vital diagnostic tool that provides important information about the overall health of a patient, including red blood cell count, white blood cell count, hemoglobin levels, and platelets.

This information is critical for diagnosing various conditions such as anemia, infection, and many other medical disorders. The use of EDTA in lavender tubes ensures that the blood cells remain in a stable state for these assessments, allowing for reliable results in the CBC. Thus, the lavender tube is specifically designed for hematological studies, making it the correct answer.