Deck 24: Hematopoietic System

Question 1

The values for a patient that has a 2% standard are: Standard = 9500 cpm
Urine sample = 658 cpm
Urine sample volume = 4 mL
Total urine volume = 1300 mL
The percent excretion for this patient is

A)15%.
B)23%.
C)45%.
D)56%.

Answer 1

45%.

Question 2

Platelet kinetics are best studied using platelets labeled with

A)(¹¹¹)In oxine.
B)(¹²⁵)I-HAS.
C)(³² )P-chromic phosphate.
D)(⁵¹)Cr-ascorbic acid.

Answer 2

(¹¹¹)In oxine.

Question 3

Anemia refers to a condition of

A)a reduced number of WBCs.
B)a reduced number of RBCs.
C)splenomegaly.
D)malabsorption.

Answer 3

a reduced number of RBCs.

Question 4

Serum is plasma with clotting factors.

Question 5

The average volume of blood plasma for a normal adult is

A)25 liters.
B)50 liters.
C)3000 mL.
D)2000 mL.

Question 6

When performing a ⁵¹Cr-labeled splenic sequestration study, the technologist does NOT take counts over the

A)liver.
B)spleen.
C)precordium.
D)thyroid.

Question 7

When blood is collected with an anticoagulant, the whole blood separates into

A)red blood cells (RBCs) and white blood cells (WBCs).
B)plasma and formed elements.
C)serum and cells.
D)platelets and serum.

Question 8

In a blood sample, the fluid from which a clot is separated is called serum.

Question 9

In a ⁵¹Cr-labeled erythrocyte survival study, a mean normal mean RBC half-life is

A)10 to 20 days.
B)25 to 35 days.
C)50 to 60 days.
D)70 to 80 days.

Question 10

Anemia could be the result of all of the following EXCEPT

A)suppression of bone marrow activity.
B)hemolysis.
C)iron deficiency.
D)erythrogenesis.

Question 11

The results of a patient's splenic sequestration study demonstrate a spleen-to-liver ratio of 2:1.This result would be considered

A)normal.
B)an example of sequestration.
C)an example of a malpositioned probe.
D)administration of a contaminated dose.

Question 12

The results of a 24-hour Stage I Schilling Test are 4% excretion of the administered dose.This patient should be considered

A)normal.
B)a candidate for a Stage II Schilling test.
C)a candidate for a repeated Stage I Schilling test.
D)to have parasitic competition for the vitamin B₁₂.

Question 13

To have a cohort label for RBCs, it would be necessary to tag the

A)circulating erythrocytes.
B)precursor erythrocytes.
C)phagocytized erythrocytes.
D)coagulated erythrocytes.

Question 14

The life span of an RBC is approximately

A)30 days.
B)60 days.
C)90 days.
D)120 days.

Question 15

The conventional agent used for the estimation of plasma volume is

A)(¹¹¹)In-oxine.
B)(¹²⁵)I-HSA.
C)(³² )P-chromic phosphate.
D)(⁵¹)Cr-ascorbic acid.

Question 16

A patient can have anemia but have a normal Hct because

A)he is sufficiently hydrated.
B)he has a decreased number of WBCs.
C)there is an increased rate of RBC production.
D)there is an increased rate of hemolysis.

Question 17

The hematocrit (Hct) represents the

A)percentage of RBCs in whole blood.
B)percentage of RBCs in the packed cells.
C)ratio of RBCs to platelets.
D)ratio of RBCs to WBCs.

Question 18

The position typically used for a patient undergoing a spleen count as part of a splenic sequestration study is

A)supine.
B)prone.
C)upright.
D)on the right side.

Question 19

When using the ⁵¹Cr-ascorbic acid method to label erythrocytes, the ascorbic acid is added to

A)transport the ⁵¹Cr across the hemoglobin molecule.
B)increase the tagging efficiency.
C)stop the tagging procedure.
D)increase counting efficiency.

Question 20

To have a random label for RBCs, it would be necessary to tag the

A)circulating erythrocytes.
B)precursor erythrocytes.
C)phagocytized erythrocytes.
D)coagulated erythrocytes.