Preanalytical variability: the dark side of the moon in laboratory testing
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Giuseppe Lippi
Abstract
Remarkable advances in instrument technology, automation and computer science have greatly simplified many aspects of previously tedious tasks in laboratory diagnostics, creating a greater volume of routine work, and significantly improving the quality of results of laboratory testing. Following the development and successful implementation of high-quality analytical standards, analytical errors are no longer the main factor influencing the reliability and clinical utilization of laboratory diagnostics. Therefore, additional sources of variation in the entire laboratory testing process should become the focus for further and necessary quality improvements. Errors occurring within the extra-analytical phases are still the prevailing source of concern. Accordingly, lack of standardized procedures for sample collection, including patient preparation, specimen acquisition, handling and storage, account for up to 93% of the errors currently encountered within the entire diagnostic process. The profound awareness that complete elimination of laboratory testing errors is unrealistic, especially those relating to extra-analytical phases that are harder to control, highlights the importance of good laboratory practice and compliance with the new accreditation standards, which encompass the adoption of suitable strategies for error prevention, tracking and reduction, including process redesign, the use of extra-analytical specifications and improved communication among caregivers.
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©2006 by Walter de Gruyter Berlin New York
Artikel in diesem Heft
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- Sixth International Symposium on Molecular Diagnostics, Graz, Austria, May 25-27, 2006
Artikel in diesem Heft
- Natriuretic peptides and evidence-based quality specifications
- Preanalytical variability: the dark side of the moon in laboratory testing
- Clinical relevance of biological variation: the lesson of brain natriuretic peptide (BNP) and NT-proBNP assay
- Hepatorenal syndrome
- Modified Levey-Jennings charts for calculated laboratory tests
- Increased free malondialdehyde concentrations in smokers normalise with a mixed fruit and vegetable juice concentrate: a pilot study
- The exponentially weighted moving average (EWMA) rule compared with traditionally used quality control rules
- Intermethod calibration of alanine aminotransferase (ALT) and γ-glutamyltransferase (GGT) results: application to Fibrotest® and Actitest® scores
- Comparison of TEST 1 with SRS 100 and ICSH reference method for the measurement of the length of sedimentation reaction in blood
- Multicenter evaluation of the interference of hemoglobin, bilirubin and lipids on Synchron LX-20 assays
- Technical evaluation of the Beckman Coulter OV-Monitor (CA 125 antigen) immunoassay
- Erythrocyte membrane Na+,K+-ATPase and Mg2+-ATPase activities in subjects with methylenetetrahydrofolate reductase (MTHFR) 677 C→T genotype and moderate hyperhomocysteinaemia. The role of L-phenylalanine and L-alanine
- Matrix metalloproteinases and their inhibitors in different acute stroke subtypes
- Pyrosequencing protocol requiring a unique biotinylated primer
- Detection of antibodies against 60-, 65- and 70-kDa heat shock proteins in paediatric patients with various disorders using Western blotting and ELISA
- Quantitative determination of erythrocyte folate vitamer distribution by liquid chromatography-tandem mass spectrometry
- Time-level relationship between indicators of oxidative stress and Glasgow Coma Scale scores of severe head injury patients
- Stepwise strategies in analysing haematuria and leukocyturia in screening
- Elevation of serum cerebral injury markers correlates with serum choline decline after coronary artery bypass grafting surgery
- Drug screening in urine by cloned enzyme donor immunoassay (CEDIA) and kinetic interaction of microparticles in solution (KIMS): a comparative study
- Release of anandamide from blood cells
- Rapid decrease in plasma D-lactate as an early potential predictor of diminished 28-day mortality in critically ill septic shock patients
- Evaluation of an immunoassay of whole blood sirolimus in pediatric transplant patients in comparison with high-performance liquid chromatography/tandem mass spectrometry
- Sample processing and its preanalytical impact on the measurement of circulating matrix metalloproteinases
- Physiological matrix metalloproteinase (MMP) concentrations: comparison of serum and plasma specimens
- Importance of the functional sensitivity determination of a serum hyaluronic acid assay for the prediction of liver fibrosis in patients with features of the metabolic syndrome
- The dilemma of invasive and non-invasive investigations for adult and paediatric non-alcoholic fatty liver disease: has the time come for a new biochemical marker?
- Is cystatin C a reliable renal marker in trauma?
- On the independence of intraindividual reference values
- Sixth International Symposium on Molecular Diagnostics, Graz, Austria, May 25-27, 2006
