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)?
1) Repeat the analysis on a different analyzer.
2) Compare the control to an actual patient sample.
3) Rerun the control sample a second time.
A)1 and 2 only
B)1 and 3 only
C)2 and 3 only
D)1, 2, and 3

Question

Quizplus · Accepted Answer

The best option to determine if the error was due to imprecision is to rerun the control sample a second time on the same analyzer, as this will help identify any potential issues with the instrument. Comparing the control to an actual patient sample would not necessarily address the issue of imprecision, as a patient sample may have its own set of variables that could affect the result. While repeating the analysis on a different analyzer could help identify issues with accuracy, it may not necessarily address imprecision. Therefore, the best course of action would be to repeat the control sample on the same analyzer.

When Analyzing a Blood Gas Control Sample, You Notice That