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#1
01-20-2010
 USMLE Forums Scout Steps History: --- Posts: 26 Threads: 17 Thanked 13 Times in 7 Posts Reputation: 23
Absolute WBC Count?

There is a sentence in Goljan that goes "A relative increase in leukocytes is an increase in the percentage of cells without a corresponding increase in the absolute number."
The absolute count is basically with respect to a particular subset of the leukocytes. Absolute count is percentage of a specific subset of cellsX the TLC.
Please explain how this is possible.
 The above post was thanked by: wahaha007 (01-20-2010)

#2
01-20-2010
 USMLE Forums Scout Steps History: Step 1 Only Posts: 28 Threads: 2 Thanked 17 Times in 9 Posts Reputation: 27

Absolute count means how many particular cells you have in micro liter.
Relative count means what percentage of a particular cells you have out of the total population of cells.

Example:
Total WBC count is 10,000 per micro liter (absolute count)
60& Neutrophils, 30% Lymphocytes, 5% Eosinophils, 4% Monocytes, 1% Basophils.
To determine the absolute count of lymphocytes for example you multiply 10,000 X 30% = 3,000 lymphocytes in micro liter (absolute count).
Determination of the absolute count via calculation of the automated results like above is not very accurate. Therefore, they may count them manually in the lab for example in cases of neutropenia where 1000 cell is the cut off for the definition of neutropenia.
 The above post was thanked by: spasemaster (03-18-2015), wahaha007 (01-20-2010)
#3
01-20-2010
 USMLE Forums Scout Steps History: --- Posts: 26 Threads: 17 Thanked 13 Times in 7 Posts Reputation: 23

Quote:
 Originally Posted by KaleKaleo Absolute count means how many particular cells you have in micro liter. Relative count means what percentage of a particular cells you have out of the total population of cells. Example: Total WBC count is 10,000 per micro liter (absolute count) 60& Neutrophils, 30% Lymphocytes, 5% Eosinophils, 4% Monocytes, 1% Basophils. To determine the absolute count of lymphocytes for example you multiply 10,000 X 30% = 3,000 lymphocytes in micro liter (absolute count). Determination of the absolute count via calculation of the automated results like above is not very accurate. Therefore, they may count them manually in the lab for example in cases of neutropenia where 1000 cell is the cut off for the definition of neutropenia.
hi, KaleKaleo. thanks for the explanation.
 The above post was thanked by: arun prabhahar (09-27-2014)

 Tags Hematology-

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