Cited by 160Clinical Laboratory Practices and Quality ControlDiabetes Management and ResearchBacterial Identification and Susceptibility Testing

Acidification of blood is superior to sodium fluoride alone as an inhibitor of glycolysis

Gambino, Raymond, Piscitelli, Janet, Ackattupathil, Tomy A, Theriault, Judy L, Andrin, Reynaldo D, Sanfilippo, Michael L, Etienne, Monina·2009·Clinical Chemistry

Abstract

Background: Sodium fluoride is the preferred agent to inhibit glycolysis. Its action is not immediate, however, and complete inhibition is delayed for up to 4 hours. A more effective method is needed. Acidification of blood combined with the addition of NaF and EDTA appears to be such a method. We studied whether acidification was indeed more effective than NaF. Methods: We conducted 6 independent studies over a 10-month period at 3 Quest Diagnostics laboratory sites. In each study, we drew venous blood from 6–24 nonfasting employee volunteers into 3 or 4 different serum- or plasma-collection tubes, which were stored under different conditions and aliquoted at different times. We analyzed the aliquots in duplicate by means of a hexokinase-based enzymatic method. Results: The mean glucose concentration decreased by 0.3% at 2 h and by 1.2% at 24 h when blood was drawn into tubes containing citrate buffer, NaF, and EDTA. In contrast, the mean glucose concentration decreased by 4.6% at 2 h and by 7.0% at 24 h when blood was drawn into tubes containing NaF and sodium oxalate. Conclusions: Acidification should replace NaF alone as the recommended method for obtaining an accurate glucose concentration. Diagnostic cut points based on blood samples collected into tubes containing NaF as the only inhibitor of glycolysis are likely to be too low.

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Crossref · 10.1373/clinchem.2008.121707

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Authors
Gambino, R., Piscitelli, J., Ackattupathil, T. A., Theriault, J. L., Andrin, R. D., Sanfilippo, M. L., & Etienne, M.
Affiliations
  • Quest Diagnostics (United States) (US)
  • Teterboro, NJ
  • West Hills, CA, and
  • Miramar, FL
Corresponding author
Gambino, Raymond
Venue
Clinical Chemistry
Published
2009-05-01
Volume
55
Issue
5
Pages
1019-1021
ISSN
  • 0009-9147 (ISSN-L)
  • 1530-8561
OpenAlex
W2156782964
Cited by
160
References
9
Citations by year
2026: 2 · 2025: 5 · 2024: 8 · 2023: 4 · 2022: 5 · 2021: 9 · 2020: 10 · 2019: 12 · 2018: 13 · 2017: 10 · 2016: 14 · 2015: 11 · 2014: 9 · 2013: 12 · 2012: 16
FWCI
7.98
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Chemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Bacterial Identification and Susceptibility Testing
Keywords
sodium fluoride, glycolysis inhibition, EDTA, sodium oxalate, blood collection tubes, serum glucose, plasma glucose, blood sample storage, diagnostic thresholds
MeSH terms
Blood, Blood Glucose, Blood Preservation, Citrates, Diabetes Mellitus, Glycolysis, Humans, Hydrogen-Ion Concentration, Sodium Fluoride, Specimen Handling

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