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Author Question: Which of the following is true regarding reference ranges? a. Should be derived from reference ... (Read 114 times)

ARLKQ

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on: Jun 25, 2018
Which of the following is true regarding reference ranges?
 
  a. Should be derived from reference books
  b. Need to be determined only for adults
  c. Can be established by running the test procedure on 10 healthy people
  d. Are ranges of values for an analyte in normal healthy people

Question 2

A patient specimen is analyzed on an instrument known to be in control from previous assays performed on a calibrated instrument and gives a hemoglobin result of 13.2 g/dL.
 
  Two hours later it is evaluated on another instrument that is being evaluated for purchase by the laboratory. The result is 11.8 g/dL. This result, when compared with the first, is:
 
  a. Acceptable agreement
  b. Reportable
  c. Precise agreement
  d. Inaccurate


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flexer1n1

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Reference ranges should be determined by evaluating a group of perhaps as many as 120 normal healthy people for the same analyte. If the analyte differs in different groups, based on data such as age and sex, then it must be determined for each group if at all possible.

Answer to Question 2

ANS: D
This result is inaccurate compared with the first because it is significantly different. Precision is not known, because multiple results are needed to determine precision; in addition, precision must be determined using the same instrument, not between instruments. Because it is not accurate, it cannot be reported.


ARLKQ

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Reply 2 on: Jun 25, 2018
Gracias!

Joy Chen

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Reply 3 on: Yesterday
Excellent

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