Comparison of D-dimer levels using coagulometer and immuno-nephelometer in Covid-19

S Shoukat1, E N G Turchan2, T I Budhy3

  • 1Universitas Airlangga - UNAIR, School of Postgraduate, Department of Immunology, Surabaya, Indonesia.

Insights

This study compared D-dimer levels in COVID-19 patients using coagulometers and immuno-nephelometers. Coagulometers proved more accurate, showing higher D-dimer levels in COVID-19 patients, indicating increased blood clot risk.

Area of Science:

  • Medical Diagnostics
  • Hematology
  • Infectious Diseases

Background:

  • COVID-19 is a severe respiratory illness linked to increased thrombotic risk.
  • D-dimer levels are crucial biomarkers for assessing blood clot formation and related conditions like DVT, PE, and DIC.
  • Elevated D-dimer levels in COVID-19 patients may serve as a prognostic indicator for disease severity.

Purpose of the Study:

  • To compare the accuracy of coagulometer and immuno-nephelometer methods in measuring D-dimer levels in COVID-19 patients.
  • To evaluate the correlation between D-dimer measurements obtained from two specific diagnostic analyzers (CS2500 and Architect i1000).
  • To determine if D-dimer levels differ significantly between COVID-19 patients and healthy individuals using these diagnostic tools.

Main Methods:

  • Blood samples were collected from COVID-19 patients confirmed via chest X-ray.
  • Plasma was isolated and analyzed for D-dimer levels using both a coagulometer (CS2500) and an immuno-nephelometer (Architect i1000).
  • Statistical analysis, including Kappa-Cohen and Mann-Whitney tests, was employed to compare the results with a 95% confidence interval.

Main Results:

  • A statistically significant difference was observed in D-dimer levels measured by the CS2500 and Architect i1000 (p=0.019).
  • COVID-19 patients exhibited higher D-dimer levels compared to normal patients across both measurement methods.
  • The study indicated that the coagulometer method provided more accurate D-dimer measurements than the immuno-nephelometer method.

Conclusions:

  • Coagulometers offer a more accurate assessment of D-dimer levels in COVID-19 patients compared to immuno-nephelometers.
  • Elevated D-dimer levels in COVID-19 patients suggest a heightened risk of thrombosis.
  • Accurate D-dimer measurement is vital for managing COVID-19 patients and assessing their risk of thromboembolic events.

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