Page 666 - Clinical Hematology_ Theory _ Procedures ( PDFDrive )

650 PART 8 ■ Fundamentals of Hematological Analysis

REVIEW QUESTIONS

*Indicates ML (optional) and MLS advanced content. 9. Which parameters are calculated rather than directly

1. Which o the ollowing is not a bene t o laboratory measured?

instrumentation to the hematology laboratory? A. Hematocrit and erythrocyte distribution width

A. Produces aster results rom specimens B. Erythrocyte count and leukocyte count

B. Reduced cost on rarely per ormed procedures C. Leukocyte count and hematocrit

C. Less variation in technique rom technologist to D. Platelet count and platelet volume

technologist

D. Increased accuracy because data are collected on 10. T e delta check method o quality control

more cells counted or analyzed A. uses the patient’s own data to monitor population

values

2. Electrical impedance principle B. uses batches o 20 samples to track MCV, MCH, and
A. T e volume o each cell is proportional to the degree MCHC values

o light scatter. C. compares the patient’s leukocyte and platelet counts

B. Each cell momentarily increases resistance. with his or her previous results

D. monitors the patient’s values within two SDs o the

3. Optical detection principle mean
A. T e volume o each cell is proportional to the degree

o light scatter. 11. Applying the optical principle o laser scatter technology

B. Each cell momentarily increases resistance. to cell counting and analysis, discrimination between

erythrocytes and platelets depends on the

4. T e abbreviation LASER stands or A. cellular volume

A. light-associated simulated emission o radiation B. cellular re ractive index

B. largely ampli ed by simulated emission o radiation C. time o f ight through the sensing zone

C. light ampli ed by stimulated emission o radiation D. all o the above

D. liquid ampli ed by stimulated emission o radiation

12. In an erythrocyte histogram, the erythrocytes that are

5. A photon is larger than normal will be to the o the normal

A. a di use orm o energy distribution curve.

B. a piece o equipment in a laser assembly A. right

C. the basic unit o all radiation B. le

D. equivalent to an atom C. in the middle

6. T e major application o f ow-cell cytometry is 13. A bimodal histogram distribution is suggestive o

A. determining cell size and granularity A. cold agglutinin disease

B. sorting o cells and cellular identi cation using B. posttrans usion o normal red cells to a person with

monoclonal antibodies abnormally sized red cells

C. treating cancer cells and identi ying speci c virus C. the presence o RBC ragments

types D. all o the above

D. counting leukocytes and platelets

14. T e ormula or the RDW is

7. Te term parameter means Patient RBC variation averagenormal RBC variation
−
A. a subset o a population A. SD o averagenoormal RBC variation

B. the mean value o a sample

C. two SDs on either side o the mean value SD

D. any numerical value that describes an entire B. Mean ×100

population

15. Te ormula or the red cell measurement is

8. Data output rom three-part di erential counters Patient RBC variation averagenormal RBC variation
−
includes A. SD o averagenoormal RBC variation

A. an erythrocyte histogram

B. a leukocyte histogram SD

C. a platelet histogram B. Mean ×100

D. all o the above