Table 1.

Typical mistakes leading to clinical laboratory nonconformities identified during three stages of the process [12–14].

Specimen collectionLaboratory analysisReporting
Wrong formSpecimen not analyzedWrong test reported
Wrong patient identificationSpecimen misplacedResult delayed
Wrong test specifiedWrong dilutionResults not ready
Incorrect sampleQuality control failureConflicting results
Unsuitable sampleWrong valueTranscription errors
Wrong containerInstrument failureCalculation errors
Wrong labelingProtocol not followedResults lost
Wrong patientWrong analysisWrong destination