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Changes in pneumonectomy-space gas tensions.

L Simonsen1, E Halkier, B Christensen

  • 1Department of Thoracic Surgery, Gentofte Hospital, University of Copenhagen, Denmark.

Scandinavian Journal of Clinical and Laboratory Investigation
|April 1, 1989
PubMed
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A new method for measuring atmospheric gas partial pressures in body cavities was developed. This technique may aid in diagnosing bronchopleural fistulas by analyzing oxygen and carbon dioxide levels in the pneumonectomy space.

Area of Science:

  • Medical Diagnostics
  • Respiratory Physiology

Background:

  • Assessing gas partial pressures in body cavities is crucial for both basic research and clinical applications.
  • Existing methods may lack simplicity or reliability for examining natural, pathological, or iatrogenic cavities.

Purpose of the Study:

  • To develop a simple and reliable method for measuring partial pressures of atmospheric gases in cavities.
  • To investigate the potential of gas analysis in the pneumonectomy space for diagnosing bronchopleural fistula.

Main Methods:

  • Measurement of partial pressures of oxygen (pO2) and carbon dioxide (pCO2) in the pneumonectomy space of nine patients post-thoracotomy.
  • Monitoring gas equilibration from thoracotomy completion to blood gas equilibrium.
  • Analysis of the difference between arterial pO2 and pneumonectomy space pO2 at equilibrium.

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Main Results:

  • Carbon dioxide (pCO2) equilibrated faster than oxygen (pO2) in the pneumonectomy space, at 6 and 50 hours respectively.
  • The equilibrium difference between arterial pO2 and pneumonectomy space pO2 was 6.5 kPa (range: 2.5–12.3 kPa).
  • Gas analysis supported X-ray findings in diagnosing a bronchopleural fistula in one patient.

Conclusions:

  • Measuring the pO2 difference between arterial blood and the pneumonectomy space may serve as a sensitive diagnostic method for bronchopleural fistula.
  • The developed method offers a potential tool for basic and clinical examination of gases in various body cavities.