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- $Unique_ID{BRK01895}
- $Pretitle{}
- $Title{What is a Complete Blood Count?}
- $Subject{Complete Blood Count counts test tests circulatory system identify
- cell cells Red hemoglobin white leukocyte leukocytes platelet platelets anemia
- anemias leukemia leukemias disease diseases red-cell red-cells white
- white-cell white-cells}
- $Volume{}
- $Log{
- Blood Cell Count Usage in Diagnosis*0002102.scf
- Blood Sample After Separation*0002101.scf
- Eosinophil and Basophil (White) Blood Cells*0002106.scf
- Lymphocyte (White) Blood Cells*0002105.scf
- Neutrophil and Monocyte (White) Blood Cells*0002104.scf
- Red Blood Cells*0002103.scf}
-
- Copyright (c) 1993 Tribune Media Services, Inc.
-
-
- What is a Complete Blood Count?
-
-
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-
- QUESTION: I know from both experience and my reading that there are literally
- hundreds of different blood tests for all sorts of things. But I can't figure
- out how they could all be done at once, as for example a complete blood test.
- Wouldn't that use more blood than a body has in its veins? In what terrible
- situation would you have to test for everything in this fashion? I know they
- do this type of testing, for I heard a doctor order one for a friend of mine
- in the hospital.
-
- ------------------------------------------------------------------------------
-
- ANSWER: You weren't paying close attention, for the order must have been for
- a complete blood "count" not a complete blood "test". You are right however,
- it would be practically impossible to run all the blood tests available to
- medical science on one person at one time. Though I have never made the
- calculation, you might also be correct in assuming there is insufficient blood
- available, although the average adult male does have about 5 quarts of blood
- in the circulatory system.
- However a complete blood count takes but a few drops of blood, for it is
- used to actually count and identify the cells which form part of the blood.
- Red cells, which also lend their color to blood (from the hemoglobin they
- contain) are the most numerous, about 20 trillion in the average human adult,
- or about 4-6 million in a cubic millimeter. There are about 20 million white
- blood cells (leukocytes) in the body, and they are the body's primary defense
- against foreign substances. The last type are platelets, and they are the
- least numerous from 150,000 to 350,000 per cubic millimeter. A blood count in
- the "old days" only used a mere fraction of a cubic millimeter, so a few
- hundred cells could be counted and then a mathematical formula used to figure
- out the total in a whole cubic millimeter (mm^3). Today's modern electronic
- devices make the process even more easy to accomplish, and more reliable.
- The blood count is used to evaluate anemias, discover certain kinds of
- white cells which are present during some types of infections, detect
- leukemias, and other clues about diseases that may be present. It is a very
- common test, used routinely to evaluate this most important substance in the
- body.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-