Chapter 16 Terminology Phlebotomy

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aperture

an opening, as in the probe of an electrical impedance or electron-optical cell counter, through which blood cells and other formed elements in diluting solution pass in single file.

cyanmethemoglobin

a very stable cyanide and hemoglobin compound that results when a solution of potassium ferrocyanide is added to blood, lysing the red blood cells and releasing their hemoglobin content.

electrical impedance cell counter

an automated hematology instrument, such as the Beckman Coulter and Abbot Cell Dyn instruments, that analyze formed elements in the blood on the basis of their impedance of an electrical.

flow cytometry

a technique that analyzes cells as they are forced through a detector system; this system could be an electric current a light or laser beam, or fluorescent dyes.

hematology calibrator

a hemotology control that is certified to be highly stable over its entire life; used to set the electronics of automated hematology instruments.

hematology control

an artificial blood, containing both human and animal cells, that is used to check the stability of electronic setting of automated hematology instruments.

histogram

a graph derived from sampling showing frequency distributions.

light scattering (optial counting) method

the method of studying formed elements in the blood that depends on their interruption of a beam of light from a laser lamp.

optical counting method

light scattering method

QBC (quantitative buffy coat) calibration check tube

the tube used with a QBC instrument to perform a daily quality control check. It gives a set of expected values and acceptable deviation values for each parameter

QBC (quantitative buffy coat) instrument

an automated hematology instrument that centrifuges non diluted blood samples and estimates blood parameter such as hemoglobin, hematocrit, platelet counts, and WBC count on the basis of differences in density and fluorescence.

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