VTNE Hematology

What does Hgb measure?

Grams of hemoglobin per microliter of whole blood

What does Hct stand for and measure?

Hematocrit and the percentage of whole blood volume composed of RBCs

What does MCV stand for and measure?

Mean Corpuscular Volume and the average size of red blood cells in femtoliters

What is femtoliters?

a femtoliter is 1 x 10^-15 liters

What does MCH stand for and measure?

Mean Corpuscular Hemoglobin and the average weight of hemoglobin per RBC in picograms

What does MCHC stand for and measure?

Mean Corpuscular Hemoglobin Concentration ad the average concentration of hemoglobin per RBC in grams per deciliter

Anemia is described as

decreased number of RBCs

Polycythemia is described as

increased number of RBCs

Rouleaux is described as

RBCs that form stacks

Agglutination is described as

RBCs that form irregular clumps

Microcytosis is described as

decreased RBC size

Macrocytosis is described as

increased RBC size

Anisocytosis is described as

increased variation in cell size

Dohle bodies are described as

round to linear blue aggregates in the cytoplasm

Howell-Jolly bodies are described as

round dense staining inclusions, usually toward one edge of the cell; represents a nuclear fragment

Hypochromia is described as

decreased pigment (increased pallor)

Hyperchromia is described as

increased pigment (lack of central pallor)

Anisochromasia is described as

increased variation in pigmentation

Polychromasia is described as

RBCs with a blue or lilac tinge

Poikilocytosis is described as

increased variation in RBC shape

Spherocytosis is described as

cells that are spherical in shape with lost central pallor

Target cells are described as

cells with strongly staining area in the middle of the central pallor region

Schistocytes are described as

fragmented RBCs that are usually angular

Echinocytes are described as

crenated RBCs with many (20-30) small, regular, blunt projections

Acanthocytes are described as

cells with irregularly distributed small projections

From which blood tube will a glucose measurement be most accurate?

a gray top

What type of preservative do gray tops have?

sodium floride