Cited by 344Clinical Laboratory Practices and Quality ControlNeonatal Health and BiochemistryBacterial Identification and Susceptibility Testing

Influence of hemolysis on routine clinical chemistry testing

Lippi, Giuseppe, Luca Salvagno, Gian, Montagnana, Martina, Brocco, Giorgio, Cesare Guidi, Gian·2006·Clinical Chemistry and Laboratory Medicine (CCLM)

Abstract

BACKGROUND: Preanalytical factors are the main source of variation in clinical chemistry testing and among the major determinants of preanalytical variability, sample hemolysis can exert a strong influence on result reliability. Hemolytic samples are a rather common and unfavorable occurrence in laboratory practice, as they are often considered unsuitable for routine testing due to biological and analytical interference. However, definitive indications on the analytical and clinical management of hemolyzed specimens are currently lacking. Therefore, the present investigation evaluated the influence of in vitro blood cell lysis on routine clinical chemistry testing. METHODS: Nine aliquots, prepared by serial dilutions of homologous hemolyzed samples collected from 12 different subjects and containing a final concentration of serum hemoglobin ranging from 0 to 20.6 g/L, were tested for the most common clinical chemistry analytes. Lysis was achieved by subjecting whole blood to an overnight freeze-thaw cycle. RESULTS: Hemolysis interference appeared to be approximately linearly dependent on the final concentration of blood-cell lysate in the specimen. This generated a consistent trend towards overestimation of alanine aminotransferase (ALT), aspartate aminotransferase (AST), creatinine, creatine kinase (CK), iron, lactate dehydrogenase (LDH), lipase, magnesium, phosphorus, potassium and urea, whereas mean values of albumin, alkaline phosphatase (ALP), chloride, gamma-glutamyltransferase (GGT), glucose and sodium were substantially decreased. Clinically meaningful variations of AST, chloride, LDH, potassium and sodium were observed in specimens displaying mild or almost undetectable hemolysis by visual inspection (serum hemoglobin < 0.6 g/L). The rather heterogeneous and unpredictable response to hemolysis observed for several parameters prevented the adoption of reliable statistic corrective measures for results on the basis of the degree of hemolysis. CONCLUSION: If hemolysis and blood cell lysis result from an in vitro cause, we suggest that the most convenient corrective solution might be quantification of free hemoglobin, alerting the clinicians and sample recollection.

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Crossref · 10.1515/cclm.2006.054

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  • In a dilution experiment, LDH activity increases significantly with the content of free Hb in samples and may exert a strong influence on result reliability.

    “Lippi et al 134 showed in a dilution experiment that the LDH activity increases significantly with the content of free Hb in the samples and may exert a strong influence on result reliability.”

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Authors
Lippi, G., Luca Salvagno, G., Montagnana, M., Brocco, G., & Cesare Guidi, G.
Affiliations
University of Verona (IT)
Venue
Clinical Chemistry and Laboratory Medicine (CCLM)
Published
2006-01-01
Volume
44
Issue
3
Pages
311-6
ISSN
  • 1434-6621 (ISSN-L)
  • 1437-4331
OpenAlex
W2084981545
Cited by
344
References
23
Citations by year
2026: 14 · 2025: 22 · 2024: 24 · 2023: 20 · 2022: 16 · 2021: 23 · 2020: 26 · 2019: 20 · 2018: 24 · 2017: 19 · 2016: 23 · 2015: 19 · 2014: 13 · 2013: 9 · 2012: 17
FWCI
7.29
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Chemistry and Laboratory Medicine (CCLM) (publishedVersion)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal Health and Biochemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Bacterial Identification and Susceptibility Testing
Keywords
pre-analytical variability, freeze-thaw lysis, alanine aminotransferase, creatine kinase, lactate dehydrogenase
MeSH terms
Autoanalysis, Blood Cell Count, Blood Chemical Analysis, Blood Proteins, Chemistry, Clinical, Electrolytes, Enzymes, Freezing, Glucose, Hemoglobins, Hemolysis, Humans, Indicator Dilution Techniques, Reproducibility of Results, Cryopreservation, Artifacts, Clinical Laboratory Techniques

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