Test Bank For Hematology in Practice 3rd Edition By Betty Ciesla 9780803668249 Chapter 1-21 Complete Guide .

,Chapter 1: Introduction to Hematology and Basic Laboratory Practice

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1. Tube length when referring to the microscope is the:
a. Resolution power of the objective
b. Distance from the eyepiece to the objective
c. Numerical aperture
d. Magnitude of the image on the stage

2. What is the most useful corrective action for the microscope when fine details cannot be visualized
in immature cells?
a. Open up diaphragm for maximum light.
b. Wipe off lenses with lens cleaner.
c. Get a new slide.
d. Move to a lower power.
3. Which of the following behaviors is a violation of standard precautions?
a. Handwashing after glove removal
b. Use of impermeable laboratory gowns
c. Use of goggles and face shields
d. Placing laboratory notebooks on laboratory work area

4. Standards and calibrators differ from control materials because:
a. An exact amount of analyte is present in a standard or calibrator
b. A variable amount of analyte is present depending on patient samples
c. Standards only need to be within a target range
d. Standards are run to the best estimate of the known value

5. If the confidence interval for most laboratories is 95.5%, what is the acceptable range for
hemoglobin if a hemoglobin control was run with a mean of 12.5 and a standard deviation of 1.0?
a. 9.5 to 12.5
b. 10.5 to 14.5
c. 11.5 to 15.5
d. 10.0 to 13.5
6. Proper mixing of samples and timely delivery of samples to the laboratory are both examples of:
a. Delta checks
b. Postanalytic variables
c. Preanalytic variables
d. Reflex testing

7. A delta check is a historical reference on samples run in the laboratories. Once a sample fails a delta
check, the most obvious corrective action is to:
a. Verify the identification of the patient sample
b. Reestablish the parameters of the delta check
c. Perform reflex testing

, d. Perform a manual method nm nm nm




8.n m n m Which of the following is the definition of a reference interval?
nm nm nm nm nm nm nm nm nm nm



a. A solution of a known amount of analyte
nm nm nm nm nm nm nm



b. Materials analyzed concurrently with unknown samples
nm nm nm nm nm



c. Values established for a particular analyte, given a method, instrument, or patien
nm nm nm nm nm nm nm nm nm nm nm



t population
nm



d. Validation techniques on flagged samples nm nm nm nm




9.n m n m Which of the following is not considered a postanalytic variable?
nm nm nm nm nm nm nm nm nm



a. Delta checks nm



b. Proper anticoagulant used nm nm



c. Specimen checked for clots nm nm nm



d. Critical results called nm nm




n m 10. n m n m Error analysis, standard protocols, and turnaround time are all part of the:
nm nm nm nm nm nm nm nm nm nm nm



a. Quality assurance system nm nm



b. Quality control program nm nm



c. Reference standards nm



d. Delta check protocol nm nm




n m 11. n m n m The average of a group of data points is defined as the:
nm nm nm nm nm nm nm nm nm nm nm



a. Mean
b. Mode
c. Median
d. Modicum
n m 12. n m n m Safety training is part of new employee training in health care and includes:
nm nm nm nm nm nm nm nm nm nm nm nm



a. Biological hazards nm



b. Chemical hazards nm



c. Environmental hazards nm



d. All of the above
nm nm nm




n m 13. n m Control materials are: nm nm



a. Analyzed concurrently with the unknown samples
nm nm nm nm nm



b. Substances with a known amount of analyte nm nm nm nm nm nm



c. Used to calibrate the method
nm nm nm nm



d. All of the above
nm nm nm




n m 14. n m n m Delta checks are used in the hematology laboratory to:
nm nm nm nm nm nm nm nm



a. Compare past patient results to the current result
nm nm nm nm nm nm nm



b. Verify control accuracy nm nm



c. Establish a target range nm nm nm



d. Establish reference ranges for a particular analyte
nm nm nm nm nm nm




n m 15. When handwashing after a patient contact, the soap application process should last at least:
n m n m nm nm nm nm nm nm nm nm nm nm nm nm nm



a. 5 seconds
nm



b. 15 seconds nm



c. 20 seconds nm

, d. 30 seconds nm




n m 16. n m n m Which of the following represents an example of a safety violation in the laboratory?
nm nm nm nm nm nm nm nm nm nm nm nm nm



a. Application of cosmetics nm nm



b. Mouth pipetting nm



c. Consuming bottled water nm nm



d. All the above
nm nm




True/False
Indicate whether the statement is true or false.
nm nm nm nm nm nm nm




n m 17. n m Standard deviation is a measurement of precision.
nm nm nm nm nm nm




n m 18. n m n m Accuracy is a measurement of the true value of an analyte.
nm nm nm nm nm nm nm nm nm nm




n m 19. n m n m A normal distribution curve will have 99.7% of the measured values fall within 2 SDs.
nm nm nm nm nm nm nm nm nm nm nm nm nm nm




Short Answer
nm