transitive verb. 1  To keep up or carry on; continue: maintain good relations. 2  To keep in an existing state; preserve or retain: maintain one's composure. 3  To keep in a condition of good repair or efficiency: maintain two cars.
Anemia is usually classified based on the size of RBCs, as measured by the mean corpuscular volume (MCV). Anemia can be microcytic (MCV typically less than 80 Î¼m3 [80 fL]), normocytic (80 to 100 Î¼m3 [80 to 100 fL]), or macrocytic (greater than 100 Î¼m3 [100 fL]).
Anemia is considered to be present if the Hb or the hematocrit (Hct) is below the lower limit of 2 standard deviations (-2SD) or the 95% confidence interval for the normal population. This definition of anemia results in 2.5% of normal individuals being classified as anemic.emoglobin is the main component of red blood cells and serves as the transporter for oxygen and carbon dioxide in the blood. Hemoglobin concentration (Hb) is usually reported as grams of hemoglobin per deciliter of blood (g/dL).