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Pneumonia I: Introduction01:30

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Related Experiment Video

Updated: Feb 2, 2026

Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice
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Lung function improvements in emphysema following pneumonia.

Kayani Kayani1, Ravi Mahadeva2, Sîan Stinchcombe2

  • 1University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom.

Respiratory Medicine Case Reports
|November 13, 2018
PubMed
Summary

Pneumonia in emphysema patients unexpectedly improved lung function and quality of life. This suggests that an infection acting as an "autobullectomy" can benefit patients with emphysema.

Keywords:
6MWD, 6 Minute Walking DistanceAutobullectomyBODE, Body mass index, airflow Obstruction, Dyspnea and Exercise capacityCAT, COPD Assessment TestCOPDCOPD, Chronic Obstructive Pulmonary DiseaseCT, Computed TomographyEBC, Endobronchial CoilEBV, Endobronchial ValvesFEV1, Forced Expiratory Volume in one secondFeNO, Fractional exhaled Nitric OxideGOLD, Global initiative for chronic Obstructive Lung DiseaseIgE, Immunoglobulin EKCO, transfer coefficient of diffusionLVRS, Lung Volume Reduction SurgeryLung volume reductionMCID, Minimal Clinically Important DifferenceNICE, National Institute for Health and Care ExcellenceRV, Residual VolumeSGRQ, St Georges Respiratory QuestionnaireVA, alveolar volume

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Area of Science:

  • Pulmonology
  • Respiratory Medicine
  • Medical Case Studies

Background:

  • Emphysema is a chronic lung disease characterized by hyperinflation.
  • Hyperinflation intervention is a common treatment for severe emphysema.
  • Pneumonia is a serious infection that can complicate chronic lung conditions.

Observation:

  • Two emphysema patients developed pneumonia before a planned hyperinflation intervention.
  • The pneumonia led to unexpected improvements in patient health.
  • Improvements were noted in physiological, anatomical, functional, and quality of life metrics.

Findings:

  • The observed improvements contradicted the typical progression of both emphysema and pneumonia.
  • The study posits that the pneumonia acted as an 'infective autobullectomy'.
  • This process involves the natural removal of diseased lung tissue via infection.

Implications:

  • Infective autobullectomy may represent a novel, albeit risky, therapeutic mechanism in emphysema.
  • This finding challenges the conventional understanding of disease progression in complex respiratory conditions.
  • Further research is warranted to explore the potential of controlled infective processes in lung disease management.