RBC Counting

Question 1

one of the tests that are used for the
diagnosis of anemia and polycythemia.

Answer 1

RBC count

Question 2

Area correction factor

Answer 2

5

Question 3

Depth correction factor

Answer 3

10

Question 4

Dilution correction factor

Answer 4

200

Question 5

What is the final dilution when you have polycythemia?

Answer 5

1:333

Question 6

When you have anemia you will only draw blood until which mark?

Answer 6

1

Question 7

When you have polycythemia you will only draw blood until which mark?

Answer 7

0.3

Question 8

What is the reference value for female?

Answer 8

3.6 –5.6 x 10 12 /L

Question 9

What is the reference value for male?

Answer 9

4.2 –6.0 x 10 12/L

Question 10

What is the reference value for newborn

Answer 10

5.0 –6.5 x 10 12/L

Question 11

Enumerate physiologic variation

Answer 11

• Increased count in dehydration
• Increased count in exercise
• Newborn children have higher counts than adults,
• Women have lower counts than male
• Individual living at higher altitudes have higher counts

Question 12

Enumerate pathologic variation

Answer 12

• Increase erythrocyte count in polycythemia.
• Increase in pulmonary tuberculosis and pulmonary
  fibrosis.
• Increase in acute poisoning
• Decrease in anemia and after hemorrhages

Question 13

Rules in counting

Answer 13

1. Observe the boundary line of the square
2. Count the cells touching halfway in and halfway out of the
   upper and left boundary lines
3. Never count cells touching halfway in and halfway out of
   the lower and right boundary lines of the square
4. Never count cells drying preparation
5. Never count cells in underfilled or overfilled chamber