CBC

Question 1

What is the name of the method by which hemoglobin is measured within RBCs?

Answer 1

Spectrophotometry

Question 2

Which of the following factors may interfere with hemoglobin readings on a CBC?

• Autoimmune disease
• Very high WBC counts
• Severe lipidemia
• Very low WBC counts

Answer 2

Very high WBC counts
and
Severe lipidemia

Question 3

Which of the following factors may lead to decreased levels of hemoglobin found on a CBC?

• Decreased #s of RBCs
• COPD
• Increased blood volume due to pregnancy or overhydration
• Lead poisoning

Answer 3

Decreased #s of RBCs

Increased blood volume due to pregnancy or overhydration

Lead poisoning

Question 4

Which morphologic feature is associated with RBCs with reduced hemoglobin concentration?

Answer 4

Microcytes
and
Hypochromic

Question 5

What conditions are associated with a decreased hematocrit value?

Answer 5

Bone marrow failure
Hemorrhage
Malignancy
IDA

Question 6

Which factors may interfere with an accurate hematocrit reading on a CBC?

Answer 6

Pregnancy, overhydration, dehydration

Question 7

Which morphologic feature does a decreased MCV indicate?

Answer 7

Microcytic RBCs

Question 8

Which of the RBC indices is not very useful in classifying anemia type?

RDW
MCHC
MCV
MCH

Answer 8

MCH

Question 9

What does a decreased mean corpuscular hemoglobin concentration (MCHC) indicate?

Answer 9

RBCs contain less hemoglobin

Question 10

Decreased MCHC (<30g/dL) indicates what type of anemia?

Answer 10

Hypochromic

Question 11

(T or F?) Hyperchromic RBCs are associated with macrocytic anemia

Answer 11

False

Question 12

Elevated MCHC (>37 g/dL) may occur with

Answer 12

Spherocytosis