When analyzing a blood gas control sample, you notice that the result falls outside the 2 SD range. How could you verify that this was a random error (error of imprecision)?
I.Repeat the analysis on a different analyzer.
II.Compare the control to an actual patient sample.
III.Rerun the control sample a second time.

Question

Quizplus · Accepted Answer

Option I allows verification of the precision of the analyzer. If the result is not within the acceptable range, then the problem lies with the analyzer instead of the control sample. Option III enables verification of the precision of the analyst. If the second result is within the acceptable range, it suggests that the original result was due to imprecision. Option II does not give any information on the precision of the analyzer or analyst, so it is not helpful in identifying the source of the error. Therefore, choices B is the best answer.

When Analyzing a Blood Gas Control Sample, You Notice That