- The National Patient Safety Goals include
A. use of the patient identifiers
B. use of proper evacuated collection tube anticoagulants
C. proper disinfection of laboratory counter tops
D. proper donning of latex gloves
A. use of the patient identifiers
- The primary intended purpose of the laboratory safety manual is to
A. protect the patient and laboratory personnel
B. protect laboratory and other hospital personnel
C. comply with local health and state regulatory requirements
D. comply with OSHA regulations
A. protect the patient and laboratory personnel
- If a blood specimen is spilled on a laboratory bench or floor area, the first step in cleanup should be
A. wear gloves and a lab coat
B. absorb blood with disposable towels
C. clean with freshly prepared 1% chlorine solution
D. wash with water
B. absorb blood with disposable towels
- The likelihood of infection after exposure to HBV-infected or HIV-infected blood or body fluids depends the least on the
A. source (anatomical site) of the blood or fluid
B. concentration of the virus
C. duration of the contact
D. presence of nonintact skin
A. source (anatomical site) of the blood or fluid
- Standard precautions have been instituted in clinical laboratories to prevent
_ exposures of healthcare workers to
bloodborne pathogens such as HIV and HBV.
A. parenteral
B. nonintact mucous membrane
c. nonintact skin
D. all of the above
ALL
6Exposure to_ constitutes the major source of HIV and
HBV infection in health care personnel.
A. sputum
B. blood
c. urine
D. semen
B. blood
7 and 8. Diluted bleach for disinfecting work surfaces, equipment, and spills should be freshly prepared by making a (7)____dilution
of household bleach. This dilution requires
____(8) mL of
bleach diluted to 100 mL with H,O.
7
A. 1:5
B. 1:10
C. 1:20
D. 1:100
8
A. 1
в. 10
C. 25
D. 50
7B 1:10
8B 10
- In which of the following laboratory situations is a verbal report permissible?
A. When the patient is going directly to the physician’s office and would like to have the report available
B. When the report cannot be found at the nurse’s station
C. When emergency test results are needed by a physician
D. None of the above
D. NOTA
- The most frequent type of laboratory specimen error is
A. preanalytical error
B. analytical error
C. postanalytical error
D. A or B
A. preanalytical error
- The delta check is used to detect
A. the use of the correct anticoagulant
B. the time of storage of a tested specimen
C. the difference between current and past patient results
D. the proper collection time of a patient specimen
C. the difference between current and past patient results
- Which of the following errors represent a preanalytical (preexamination) error?
A. wrong assay performed
B. Failure to run a normal control specimen when testing
C. Calling the ER with stat results
D. incorrect labeling of a specimen
D. incorrect labeling of a specimen
*13. Instrument calibration should be performed, at least, according to CLIA.
A. Once a year
B. Twice a year
C. Three times a year
D. Daily
B. Twice a year
- A control specimen is
A. a known value in a specimen similar to a patient specimen
B. closeness to the true value
C. the process of monitoring accuracy
D. comparison to a known physical constant
A. a known value in a specimen similar to a patient specimen
- The term accuracy means
A. a known value in a specimen similar to a patient specimen
B. closeness to the true value
C. the process of monitoring accuracy
D. comparison to a known physical constant
B. closeness to the true value of
- The term precision means
A. how close test results are when repeated
B. a purified substance of a known composition
C. the process of monitoring accuracy and reproducibility of known control results
D. the value is unknown
A. how close test results are when repeated
- The term calibration means
A. a known value in a specimen similar to a patient specimen
B. closeness to the true value
C. the process of monitoring accuracy
D. comparison to a known physical constant
D. comparison to a known physical constant
*18. Which of the following is not a function of a quantitative QC program?
A. Monitors the correct functioning of equipment, reagents, and individual technique
B. Confirms the correct identity of patient specimens
C. Compares the accuracy of controls to reference values
D. Detects shifts in control values
B. Confirms the correct identity of patient specimens
- The standard deviation is
A. the difference between the upper and lower measurements in a series of results
B. The expression of the position of each test result to the average
C. The arithmetic average
D. The degree to which test data vary about the average
D. The degree to which test data vary about the average
*20. The term variance means
A. sum of the squared differences from the mean
B. square root of the variance from the mean
C. standard deviation expressed as a percentage of the mean
D. degree to which test data vary about the average
D. degree to which test data vary about the average
*21. When validating a control reference range, what is the minimum number of patient samples needed to calculate the deviations from the mean value?
A. 10
в. 20
С. 30
D. 100
в. 20
- Acceptable limits of a control value must fall
A. within ‡1 standard deviation of the mean
B. between 1 and 2 standard deviations of the mean
C. within +2 standard deviations of the mean
D. within ‡3 standard deviations of the mean
C. within +2 standard deviations of the mean
*23. A trend change in QC data is
A. a progressive change all in one direction away from the mean for at least 3 days
B. an abrupt shift in the control values
C. scattered variations from the mean
D. a progressive change in various directions away from the mean for at least 1 week
A. a progressive change all in one direction away from the mean for at least 3 days
- A continuously increasing downward variation in a control sample in one direction from the mean can indicate
A. deterioration of reagents used in the test
B. deterioration of the control specimen
C. deterioration of a component in an instrument
D. all of the above
D. all of the above
- Which of the following statements is true of a Gaussian distribution
A. It represents the standard deviation.
B. It represents the coefficient of variation.
C. It represents variance of a population.
D. It represents a normal bell-shaped distribution.
D. It represents a normal bell-shaped distribution.
