BLOOD TESTS # 5

Question 1

What is a hematocrit

Answer 1

Measures % of RBC per volume of blood

Question 2

Normal values in hematocrit

Answer 2

Normal values: 37-48% (females)
40-52% (males)

Question 3

Names for low and High RBC

Answer 3

Low value of RBC could indicate anemia
High value of RBC could indicate polycythemia

Question 4

WHat is a blood smear?

Answer 4

Done as a part of a CBC
WBC differential is used to calculate % of EACH type of WBC (lymphocytes, macrophages, neutrophils, eosinophils and basophils)
Count 100 WBC on the slide and keep a tally of each type

Question 5

Normal Differential Counts
(WBC)

Answer 5

Neutrophils 50-70%
Eosinophil 1-3%
Basophil 0-1%
Lymphocyte 25-35%
Macrophage 4-6%

Question 6

How does seeing WBC count help you identify an infection?

Answer 6

Certain types of WBC increase after certain infections. E.g. lymphocytes increase after certain viral infections and eosinophil’s with certain parasites.
Shapes of cells are also looked at. Can be used to diagnose sickle cell anemia

Question 7

Normal WBC COunt & abnormal

Answer 7

5000-10000

below 5000 indicate leukopenia and high counts are called leukocytosis.

Question 8

Leukopenia can be caused by…

Answer 8

spleen or liver damage or certain drugs

Question 9

Leukocytosis can be caused by…

Answer 9

infectious disease, inflammatory disease (allergies, rheumatoid arthritis), leukemia

Question 10

What is the normal RBC count?

Answer 10

4-6 million

Question 11

HEMOCYTOMETER LAB PROTOCAL

Answer 11

Cells that touch LEFT or TOP line are COUNTED
Cells that touch RIGHT or BOTTOM line are NOT counted