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Could light meal jeopardize laboratory coagulation tests?

Gabriel Lima-Oliveira1, Gian Luca Salvagno2, Giuseppe Lippi3

  • 1Laboratory of Clinical Biochemistry, Department of Life and Reproduction Sciences, University of Verona, Verona, Italy ; Post-Graduate Program of Pharmaceutical Sciences, Department of Clinical Analysis, Federal University of Parana, Curitiba, Parana, Brazil ; CAPES Foundation, Ministry of Education of Brazil, Brasília - DF, Brazil ; MERCOSUL: Sector Committee of Clinical Analyses and in Vitro Diagnostics - CSM 20, Rio de Janeiro, Brazil.

Biochemia Medica
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Summary

A light meal does not significantly affect key laboratory coagulation tests. However, standardizing fasting times to 12 hours is recommended to ensure complete lipid metabolism before blood draws.

Keywords:
diagnostic errorsfastingpostprandial periodreference valuesreproducibility of results

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Area of Science:

  • Clinical Chemistry
  • Hematology
  • Laboratory Medicine

Background:

  • Fasting time requirements for laboratory coagulation tests are not standardized.
  • This lack of standardization may pose risks to patient safety.
  • Investigating the impact of a light meal on coagulation tests is crucial.

Purpose of the Study:

  • To evaluate if a light meal affects standard laboratory coagulation tests.
  • To determine the safety of consuming a light meal before blood collection for coagulation analysis.

Main Methods:

  • 17 fasting volunteers provided baseline blood samples (12h fast).
  • Blood samples were collected 1, 2, and 4 hours after a light meal.
  • Coagulation tests included APTT, PT, Fibrinogen, AT, Protein C, and Protein S.

Main Results:

  • Antithrombin III (AT) activity was significantly higher at 1h and 4h post-meal (P < 0.05).
  • Activated Partial Thromboplastin Time (APTT) was significantly lower at 2h post-meal (P = 0.041).
  • Fibrinogen (Fbg) and Protein S (PS) levels were not significantly affected by the meal.

Conclusions:

  • A light meal does not significantly impact the assessed laboratory coagulation tests.
  • Standardizing fasting to 12 hours is suggested for complete lipid metabolism.
  • Further standardization ensures consistent and reliable coagulation test results.