CBC

Question 1

What is in a CBC? (9 items)

Answer 1

WBC, RBC, Hgb, Hct, MCV, MCH, MCHC, RDW, Plt

Question 2

WBC norm value?

Answer 2

4-10,000/mm3

Question 3

RBC norm value?

Answer 3

3.5-5.0 mil/mm3

Question 4

Hgb norm value?

Answer 4

12-17 grams%

Question 5

Hct norm percentage?

Answer 5

36-52%

Question 6

MCV norm value?

Answer 6

82-94 fl

Question 7

MCH norm value?

Answer 7

27-31 pg

Question 8

MCHC norm percentage?

Answer 8

32-35%

Question 9

RDW norm percentage?

Answer 9

10-12.5 %

Question 10

Plt. norm value?

Answer 10

150,000-400,000 /mm3

Question 11

What can increased RBC levels indicate?

Answer 11

dehydration or bone marrow disorders like polycythemia vera

Question 12

What does RDW stand for?

Answer 12

Red cell distribution width

Question 13

What happens to RDW’s in anemia?

Answer 13

They increase

Question 14

RBC variation should be within what percentage?

Answer 14

11.5% - 15%

Question 15

A high RDW test means what?

Answer 15

the red blood cells measured varied widely in size.

Question 16

Abnormal RDW (red cell distribution width) can be associated with what pathologies?

Answer 16

anemias, liver disease and a deficiency in folate.

Question 17

RBC elevated over the norm of 3.5-5.0 million/ mm3 can indicate?

Answer 17

Dehydration due to less vascular volume or bone marrow disorders like polycythemia vera which is an overproduction of RBC’s.

Question 18

RBC numbers lower than 3.5 million /mm3 can be an indicator of?

Answer 18

anemias, RBC hemolysis and hemoglobinopathies.

Question 19

How do we diagnose anemias?

Answer 19

We use a CBC combined with Fe studies to diagnose anemias.

Question 20

What is the normal Hgb/Hct ratio?

Answer 20

1:3 for example 10g = 30%, 12 g = 36%, 15g = 45%

Question 21

How do you measure RBC size?

Answer 21

Wintrobes classification of anemia by evaluation of mean corpuscle volume or MCV.

Question 22

RBC that are microcytic are?

Answer 22

A small cell with MCV <80fL

Question 23

RBC’s that are normocytic are?

Answer 23

A normal size with MCV 80-96fL

Question 24

RBC’s that are macrocytic are?

Answer 24

A large size with MCV>96fL

Question 25

How do we measure the RBC hemoglobin content?

Answer 25

By evaluating the MCH (Mean corpuscular hemoglobin) and the MCHC (Mean cell hemoglobin concentration) (measuring the color and amount of heme

Question 26

What is the source of RBC color?

Answer 26

Hemoglobin (another word for color is “chromic”)

Question 27

Normochromic RBC measurements read as?

Answer 27

MCHC 31-37g/dl

Question 28

Hypochromic RBC measurements read as?

Answer 28

Pale, MCHC <31g/dl