Erythrocyte Traits: Serum/Plasma Mass Concentration (Hemoglobin, Hematocrit, or Red Blood Cell Indices)

What This Test Measures

This test evaluates several aspects of red blood cells in your blood sample, including the concentration of hemoglobin (the protein that carries oxygen) and other indices that assess cell size, shape, and overall function. These measurements help determine if your red blood cells are functioning properly or if there may be an underlying issue such as anemia or blood disorders.

Why It’s Done

Doctors may order this test to diagnose or monitor conditions like anemia, iron deficiency, blood disorders, or to check for signs of chronic diseases that affect red blood cells. It can also be part of routine blood work to ensure overall health.

Common Reasons for Testing

Common reasons include unexplained fatigue, pale skin, shortness of breath, frequent infections, or if you have a history of blood-related conditions. It may also be used during pregnancy, before surgeries, or to evaluate symptoms like dizziness or rapid heartbeat.

Sample Collection and Preparation

A blood sample is drawn from a vein, usually in your arm. You may be asked to fast for a few hours before the test, depending on the specific instructions from your healthcare provider. The blood is then processed to separate serum or plasma for analysis.