Laboratory error undetectable by customary quality control/quality assurance monitors

S. C. Kazmierczak, P. G. Catrou

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The preanalytical, analytical, and postanalytical rates of laboratory error have not been studied extensively. We evaluated the preanalytical, analytical, and postanalytical components of laboratory error in 438 consecutive samples submitted to a clinical chemistry laboratory for measurement of creatinine concentrations in plasma. We performed red blood cell antigen determinations to establish patient-sample identity, repeated analysis of creatinine in duplicate to detect analytical error, and tracking of patient specimens from receipt by the laboratory to entry of the laboratory result in the patient's information system record. We found a total error rate of 9.36%. A breakdown of the total error rate into its preanalytical, analytical, and postanalytical components revealed error rates of 0.00%, 8.90%, and 0.46%, respectively. These results suggest that preanalytical and postanalytical error, which are not usually detectable by common quality control strategies, are not major sources of laboratory error. Further work is needed to reduce the unacceptably high rate of analytical errors.

Original languageEnglish (US)
Pages (from-to)714-718
Number of pages5
JournalArchives of Pathology and Laboratory Medicine
Issue number7
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology


Dive into the research topics of 'Laboratory error undetectable by customary quality control/quality assurance monitors'. Together they form a unique fingerprint.

Cite this