After a new reagent lot is introduced, both levels of chemis… | 마이메르시 MyMerci
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Laboratory Operations · 검사실 운영
문제
After a new reagent lot is introduced, both levels of chemistry control remain on the same side of the mean for many consecutive runs. What does this pattern most strongly suggest?
1A purely random error affecting only one individual result in the run, such as a transient pipetting mistake that leads to an outlier
2No analytical change because all values remain within 3 standard deviations of the established mean, indicating stable performance
3A patient identification error causing consistent sample mislabeling throughout the entire run, leading to biased results
4A systematic shift requiring investigation of calibration, reagent lot, or method bias✓ 정답
해설
A sustained displacement of control results to one side of the established mean indicates systematic error or a shift, often associated with calibration or reagent changes.