Preanalytical variation Flashcards
- Which of the following statements best describes the way
interference factors may be reduced or eliminated?
a. By standardizing the preanalytical conditions
b. By providing proper instructions to the patients on
how to prepare for blood sampling
c. By selecting a more specific method
d. By selecting the appropriate sampling procedure
e. By maintaining the analytical variability (method CVA)
to a minimum
c. By selecting a more specific method
- Spectrophotometric interference of hemolysis occurs due
to the ability of hemoglobin to absorb light at which wavelengths?
a. 400, 500, and 600 nm
b. 550 and 570 nm
c. 540 and 600 nm
d. 415 and 540 nm
e. 415, 540, and 570 nm
e. 415, 540, and 570 nm
- Recommended sample for the accurate measurement of
potassium is which of the following?
a. Plasma
b. Serum
c. Whole blood
d. Capillary blood
e. Arterial blood
a. Plasma
- Which of the following statements is true for lipid testing
and testing for lipid-soluble drugs and hormones?
a. Testing should always be done in a delipidated sample.
b. Testing should always be done on the native sample
before delipidation
c. Delipidation does not affect the concentration of lipids
and lipid-soluble drugs.
d. The most suitable delipidation method is ultracentrifugation.
e. The most suitable delipidation method is lipid removal
using the lipid clearing agents.
b. Testing should always be done on the native sample
before delipidation
- Major sources of exogenous interferences are described
below, EXCEPT?
a. Prescribed medications
b. Supportive medical therapy like parenteral emulsions,
contrast media agents, or infusion solutions
c. Dietary supplements
d. Accidental exposure and poisoning
e. In vivo hemolysis
e. In vivo hemolysis
- According to the International Council for Standardization in Haematology, the anticoagulant of choice for
hematology testing is:
a. dipotassium EDTA.
b. tripotassium EDTA.
c. disodium EDTA.
d. 3.8% sodium citrate.
e. 3.2% sodium citrate.
a. dipotassium EDTA.
