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Femoral Arterial and Venous Catheterization for Blood Sampling, Drug Administration and Conscious Blood Pressure and Heart Rate Measurements
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Femoral Arterial and Venous Catheterization for Blood Sampling, Drug Administration and Conscious Blood Pressure and Heart Rate Measurements

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Diagnosis of vascular catheter-related bloodstream infection: a meta-analysis

Y Siegman-Igra1, A M Anglim, D E Shapiro

  • 1Infectious Disease Unit, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Israel.

Journal of Clinical Microbiology
|April 1, 1997
PubMed

Insights

Quantitative culture of catheter segments is the most accurate method for diagnosing catheter-related bloodstream infections. Unpaired quantitative catheter blood culture offers the best cost-effectiveness, particularly for long-term catheters.

Area of Science:

  • Infectious Diseases
  • Medical Diagnostics
  • Health Economics

Background:

  • Catheter-related bloodstream infections (CRBSIs) present a growing clinical challenge, marked by increased incidence, significant patient morbidity and mortality, and substantial healthcare costs.
  • Accurate diagnosis of CRBSIs is often difficult due to the frequent absence of localized inflammation at the catheter insertion site.
  • The comparative accuracy and cost-effectiveness of various microbiological tests for diagnosing CRBSIs remain incompletely understood.

Purpose of the Study:

  • To systematically evaluate the diagnostic accuracy of different microbiological tests for identifying catheter-related bloodstream infections.
  • To compare the cost-effectiveness of these diagnostic methods, incorporating costs associated with false positives and treatment.
  • To identify the most accurate and cost-effective diagnostic strategy for CRBSIs.

Main Methods:

  • A meta-analysis was performed on 22 studies encompassing six different diagnostic test methods for CRBSIs.
  • Diagnostic accuracy was assessed using pooled sensitivity, specificity, and summary receiver operating characteristic (ROC) curve analysis.
  • Test costs were estimated using College of American Pathologists guidelines, including costs for catheter replacement and antibiotic therapy for false positives.

Main Results:

  • Quantitative catheter segment cultures demonstrated increasing accuracy with higher levels of quantitation (quantitative > semiquantitative > qualitative), primarily due to enhanced specificity.
  • Quantitative catheter segment culture achieved the highest Youden index (0.85) and was the sole method with pooled sensitivity and specificity exceeding 90%.
  • Unpaired quantitative catheter blood culture was the most cost-effective test, despite having a sensitivity of only 78%.

Conclusions:

  • Quantitative culture of catheter segments is the most accurate microbiological method for diagnosing CRBSIs.
  • Unpaired quantitative catheter blood culture represents the most cost-effective diagnostic test, particularly for patients with long-term indwelling catheters.

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