RBC Counting Flashcards
The red cell count is the number of red cells in _____.
1 cu.mm.
The RBC Count is one of the tests that are used for _____.
Diagnosis of Anemia and Polycythemia
Formula for RBC Count:
of RBC counted x area correction factor x depth correction factor x dilution factor
Area used in the actual cell count:
1/5 mm^2
Area correction factor:
5
Depth of the counting chamber:
0.1 or 1/10mm
Depth correction factor:
10
Dilution:
1:200 or 1/200
Dilution correction factor:
200
Formula for RBC Count with values indicated:
of RBC Cells counted x 5 x 10 x 200 or # of RBC Cells counted x 10,000
To diagnose Polycythemia or Erytheremia, the blood is drawn to _____ mark of the RBC pipette and the diluent up to _____.
0.3
101
To diagnose Anemia, the blood is drawn to _____ mark of the RBC pipette and the diluent up to _____.
1
101
Dilution factor for Polycythemia/Erythremia:
1/300 or 1:333
Dilution factor for Anemia:
1/100 or 1:00
Normal Value of RBC for Female:
3.6 - 5.6 x10^12/L
Normal Value of RBC for Male:
4.2 - 6.0 x 10^12/L
Normal Value of RBC at Birth:
5.0 - 6.5 x 10^12/L
Physiologic Variation:
Increased count in dehydration
Increased count in exercise
Newborn children have higher count than adults
Women have lower counts than male
Individual living at higher altitude have higher counts
Pathologic Variation:
Increased erythrocyte count in polycythemia
Increase in pulmonary tuberculosis and pulmonary fibrosis
Increase in acute poisoning
Decrease in anemia and after hemorrhages