A control result falls more than three standard deviations from the mean. What is the appropriate action?

Question

Accepted Answer

보기 2: Reject the run, investigate the cause, correct it, and repeat

A control value beyond 3 standard deviations is a rejection, not a warning. Patient results from that run must be withheld while the cause is investigated and corrected, and the run repeated. Check control material deterioration, then reagent, instrument, and technique.

Answer

보기 1: Report patient results and repeat the control on the next run

Answer

보기 3: Report patient results with a disclaimer

Answer

보기 4: Recalculate the control mean to include the new value

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A control result falls more than three standard deviations from the mean. What is the appropriate action?

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