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Related Experiment Videos

Diagnostic tools in tuberculous pleurisy: a direct comparative study.

A H Diacon1, B W Van de Wal, C Wyser

  • 1Institute of Internal Medicine, University of Stellenbosch Medical School, Tyberberg Hospital, Cape Town, South Africa. ahd@sun.ac.za

The European Respiratory Journal
|October 30, 2003
PubMed
Summary

A cost-effective diagnostic approach for tuberculous pleurisy is needed in resource-poor regions. Combining adenosine deaminase, cell counts, and closed needle biopsy accurately diagnoses pleural effusions, potentially replacing expensive thoracoscopy.

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Area of Science:

  • Pulmonology
  • Infectious Diseases
  • Diagnostic Medicine

Background:

  • Tuberculous (TB) pleurisy diagnosis relies on thoracoscopy, which is accurate but costly.
  • High TB-incidence regions often lack resources for routine thoracoscopy.
  • There is a need for cost-effective diagnostic alternatives for pleural effusions.

Purpose of the Study:

  • To compare the diagnostic accuracy of various methods for tuberculous pleurisy.
  • To evaluate a cost-effective combination of tests as an alternative to thoracoscopy.

Main Methods:

  • Prospective study comparing bronchial wash, pleural fluid analysis (microbiology, adenosine deaminase [ADA], cell count), closed needle biopsy, and medical thoracoscopy.
  • 51 patients with undiagnosed exudative pleural effusions were recruited.

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Main Results:

  • Tuberculous pleurisy was diagnosed in 82% of patients.
  • Medical thoracoscopy achieved 100% sensitivity and specificity.
  • Pleural fluid ADA > or = 50 U x L(-1) showed 95% sensitivity and 89% specificity.
  • A combination of ADA, lymphocyte/neutrophil ratio, and closed needle biopsy reached 93% sensitivity and 100% specificity.

Conclusions:

  • A combination of pleural fluid adenosine deaminase, differential cell count, and closed needle biopsy offers high diagnostic accuracy for undiagnosed exudative pleural effusions.
  • This cost-effective approach may substitute medical thoracoscopy in resource-limited settings with high TB incidence.