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26 terms

Chapter 14 Terminology Phlebotomy

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absolute polycythemia
erythrocytosis; an increase in the number of red blood cells because of increased red blood cell production.
agglutination
a clumping together, as of red blood cells.
anoxia
a deficiency of oxygen.
aplastic anemia
anemia caused by deficient red blood cell production, due to disorders of the bone marrow.
coverslip
small, thin glass used to cover liquid specimens on the slides to protect the microscope and stabilize the specimen. A special coverslip is manufactured for use by the hemacytometer.
epinephrine
adrenaline; an adrenal gland hormone that stimulates the sympathetic nervous system.
erythremia
polycythemia vera
erythrocyte count
red blood cell count.
erythrocytosis
absolute polycythemia
hemacytometer
a counting device or counting chamber to count cells such as red or white blood cells.
hemolyze
the destruction of red blood cells, which releases the hemoglobin.
isotonic
having the same osmotic pressure. An isotonic solution with the same osmotic pressure as red blood cells is used to prepared blood for red blood cell count
leuocyte count
white blood cell count.
leukocytsis
an abnormal high white blood cell count.
leukopena
an abnormally low white blood cell count, usually below 4,500/mm
neoplasm
an abnormal growth of tissue, such as atumor.
nucleated red blood cell(nRBC)
a red blood cell that contains a nucleus. It resembles a white blood cell under low power magnification and may erroneously inflate the white blood cell count.
pernicious anemia
a potentially fatal form of anemia that may be due to deficiency or malabsorbtion of vitamin B12. Pernicious anemia is associated with an abnormally low white blood cell count.
polycythemia
an increase above normal in the number of red blood cells in circulation.
polycythemia vera
erythremia; a chronic, usually fatal disease of the bone marrow that results in greatly elevated red blood cell count.
pseudoagglutination
the clumping together of red blood cells as in the formation of rouleaux but differing from true agglutination in that the clumped cells can be dispersed by shaking.
red blood cell (RBC) count
erythrocyte count; the number of reb blood cells per cubic millimeter of blood; performed manually by counting red blood cells under a high power magnification on a hemacytometer. Whole blood is diluted with an isotonic solution that prevents lysing of red blood cells.
relative polycythemia
an increase in red blood cells relative to plasma volume. It occurs due to dehydration.
reticulocyte
an immature red blood cells that retain traces of endoplasmioc reticula.
rouleaux
a clump of red blood cells that appear to be stacked like a roll of coins.
white blood cell (WBC) count
leukocyte count; the number of white blood cell per cubic millimeter of blood; counted manually under low power magnification on a hemacytometer. Whole blood is diluted with a solution that lyses red blood cells.