RODAK'S CH 15 AUTOMATED BLOOD CELL ANALYSIS/ Q&A _ VERIFIED
1. Counting the number and size of electrical interferences created by blood cells as they pass through a
small aperture is a description of which of the following principles?
a. electronic impedance
b. optical scatter
c. conductivi...
1. Counting the number and size of electrical interferences created by blood cells as they pass through a
small aperture is a description of which of the following principles?
a. electronic impedance
b. optical scatter
c. conductivity
d. laminar flow - CORRECT ANSWER - A
2. What technology minimizes the problems of a rigid aperture, including protein buildup, coincidence,
and a single cell being counted twice?
a. forward scatter
b. radiofrequency
c. hydrodynamic focusing
d. fluorescence - CORRECT ANSWER - C
3. Forward light scatter, when used in an instrument using the optical scatter principle, correlates with
cell
a. granules
b. volume
c. nuclear chromatin
d. number - CORRECT ANSWER - B
4. What does the pneumatic system of cell counters do?
a. operates the valves and moves the sample
b. controls computer software
c. digitizes the pulses generated by cell passage
d. controls the laser light - CORRECT ANSWER - A
, 5. How do Beckman Coulter and Abbott instruments count red cells and platelets?
a. florescent staining and enumeration
b. survival staining and conductivity
c. optical scatter
. electrical impedance - CORRECT ANSWER - D
6. Which of the following is determined by light transmission between 525 and 555 nm on automated
counting instrumentation?
a. reticulocytes
b. hemoglobin
c. mean cell volume (MCV)
d. mean cell hemoglobin (MCH) - CORRECT ANSWER - B
7. Which of the following is always calculated on cell counters?
a. hematocrit
b. MCV
c. mean cell hemoglobin concentration (MCHC)
d. red blood cell count - CORRECT ANSWER - C
8. What is the mechanism for the three-part differential found in older Coulter machines or those
designed for smaller laboratories?
a. volume, conductivity, scatter
b. multiangle polarized scatter separation
c. peroxidase staining and light scatter
d. impedance after cytoplasm shrinkage - CORRECT ANSWER - D
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