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The page below is a sample from the LabCE course Quality Control. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Internal Quality Control

  • Quality control may be accomplished both internally and externally.
  • Internal quality control usually involves testing commercially-purchased materials and comparing the results to known values.
  • Since there is little delay in feedback, internal quality control is used for immediate decisions.
  • Although internal quality control finds both random and systematic errors, it is subject to flaws in the testing process.
  • If there was a systematic error present when a test's in-house baseline was set, further systematic error would go undetected.