Select the ONE answer that is BEST in each case.
The function (or functions) of a hematology laboratory is (are) to
The major intended purpose of the laboratory safety manual is to
Which of the following is not an appropriate safety practice?
If a blood specimen is spilled on a laboratory bench or fl oor area, the fi rst step in cleanup should be
Which of the following procedures is the most basic and effective in preventing nosocomial infections?
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The likelihood of infection after exposure to HBV-infected or HIV-infected blood or body fl uids depends on all of the following factors except the
HBV and HIV may be directly transmitted in the occupational setting by all of the following except
Standard precautions have been instituted in clinical laboratories to prevent _____ exposures of healthcare workers to bloodborne pathogens such as HIV and HBV.
Exposure to _____ constitutes the major source of HIV and HBV infection in healthcare personnel.
The transmission of HBV is _____ probable than transmission of HIV.
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Gloves for medical use may be
Diluted bleach for disinfecting work surfaces, equipment, and spills should be prepared daily by preparing a _____ dilution of household bleach.
The laboratory procedure manual does not need to include
Which of the following statements is not a nonanalytical factor in a Quality Assessment system?
In which of the following laboratory situations is a verbal report permissible?
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_____ Accuracy
_____ Calibration
_____ Control
_____ Precision
_____ Standards
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_____ Quality
Which of the following is not a function of a quantitative QC program?
_____ Mean
_____ Range
_____ Variance
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_____ Standard deviation
The coeffi cient of variation is the
The z score measures
Acceptable limits of a control value must fall
A trend change in QC data is
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A continuously increasing downward variation in a control sample in one direction from the mean can indicate
Which of the following statements is true of a gaussian curve?
Two standard deviations (2 SD) from the mean in a normal distribution curve would include
| 1. The function (or functions) of a hematology laboratory is (are) to A. confirm the physician’s impression of a possible hematological disorder B. establish or rule out a diagnosis C. screen for asymptomatic disorders D. all of the above |
| 2. The major 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 |
| 3. Which of the following is not an appropriate safety practice? A. Disposing of needles in biohazard, puncture-proof containers B. Frequent handwashing C. Sterilizing lancets for reuse D. Keeping food out of the same areas as specimens |
| 4. If a blood specimen is spilled on a laboratory bench or floor area, the fi rst 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 |
| 5. Which of the following procedures is the most basic and effective in preventing nosocomial infections? A. Washing hands between patient contacts B. Wearing laboratory coats C. Isolating infectious patients D. Isolating infectious specimens |
| 6. The likelihood of infection after exposure to HBV-infected or HIV-infected blood or body fluids depends on all of the following factors except 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 |
| 7. HBV and HIV may be directly transmitted in the occupational setting by all of the following except A. parenteral inoculation with contaminated blood B. exposure of intact skin to contaminated blood or certain body fluids C. exposure of intact mucous membranes to contaminated blood or certain body fluids D. sharing bathroom facilities with an HIV-positive person |
| 8. 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 |
| 9. Exposure to _____ constitutes the major source of HIV and HBV infection in healthcare personnel. A. sputum B. blood C. urine D. semen |
| 10. The transmission of HBV is _____ probable than transmission of HIV. A. less B. more |
| 11. Gloves for medical use may be A. sterile or nonsterile B. latex or vinyl C. used only once D. all of the above |
| Diluted bleach for disinfecting work surfaces, equipment, and spills should be prepared daily by preparing a _____ dilution of household bleach.
A. 1:5 |
| 14. The laboratory procedure manual does not need to include A. test method, principle of the test, and clinical applications B. specimen collection and storage procedures C. the name of the supplier of common laboratory chemicals D. QC techniques, procedures, normal values, and technical sources of error |
| 15. Which of the following statements is not a nonanalytical factor in a Quality Assessment system? A. Qualified personnel and established laboratory policies B. Monitoring the standard deviation and reporting results of normal and abnormal controls C. Maintenance of a procedure manual and the use of appropriate methodology D. Preventive maintenance of equipment and correct specimen collection |
| 16. 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 |
| 17 _____ Accuracy
A. The value is known in a specimen similar to a patient’s whole blood or serum. |
| 18 _____ Accuracy
A. The value is known in a specimen similar to a patient’s whole blood or serum. |
| 19 _____ Control
A. The value is known in a specimen similar to a patient’s whole blood or serum. |
| 20. _____ Precision
A. How close test results are when repeated. |
| 21. _____ Standards
A. How close test results are when repeated. |
| 22. _____ Quality
A. How close test results are when repeated. |
| 23. 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 |
| 24. _____ Mean
A. The difference between the upper and lower measurements in a series of results |
| 25. _____ Range
A. The difference between the upper and lower measurements in a series of results |
| 26. _____ Variance
A. The difference between the upper and lower measurements in a series of results |
| 27. _____ Standard deviation
A. The difference between the upper and lower measurements in a series of results |
| 28. The coeffi cient of variation is the 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 |
| 29. The z score measures A. how many standard deviations a particular number is from the right or left of the mean B. the sum of the squared differences from the mean C. the square root of the variance from the mean D. the expression of the position of each test result to the average |
| 30. 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 |
| 31. 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 |
| 32. 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 |
| 33. Which of the following statements is true of a gaussian curve? A. It represents the standard deviation. B. It represents the coeffi cient of variation. C. It represents variance of a population. D. It represents a normal bell-shaped distribution. |
| 34. Two standard deviations (2 SD) from the mean in a normal distribution curve would include A. 99% of all values B. 95% of all values C. 75% of all values D. 68% of all values |
