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Unilateral Lung Volume Analysis Using Micro-CT for Enhanced Assessment of Pulmonary Fibrosis in Preclinical Models

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STUDIES OF LUNG VOLUME : III. TUBERCULOUS WOMEN.

A Garvin¹, C Lundsgaard, D D Van Slyke

¹New York State Sanatorium for Tuberculosis, Ray Brook, and the Hospital of The Rockefeller Institute for Medical Research, New York.

The Journal of Experimental Medicine

|October 30, 2009

Summary

Pulmonary tuberculosis impacts lung volumes, with advanced stages showing decreased total and vital lung capacity. Incipient tuberculosis may present with normal or reduced lung volumes, depending on clinical presentation.

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Area of Science:

Pulmonary Medicine
Respiratory Physiology

Background:

Pulmonary tuberculosis (TB) is a significant global health concern.
Understanding its impact on lung function is crucial for diagnosis and management.

Purpose of the Study:

To determine total lung capacity, middle capacity, and residual air in adult women with pulmonary tuberculosis.
To compare lung volumes in women with TB to established norms and findings in men.

Main Methods:

Pulmonary function tests including total capacity, middle capacity, and residual air measurements.
Chest volume determination and calculation of normal lung volumes using established ratios.
Diaphragmatic excursion assessment via fluoroscopy.

Main Results:

Incipient TB: Five of eight patients showed normal total capacity, increased residual air, and decreased vital capacity. Three patients had significantly diminished total capacity, associated with clinical abnormalities.
Moderately to advanced TB: Twelve patients exhibited decreased total and vital capacity, with near-normal residual air, consistent with findings in men.

Conclusions:

Pulmonary tuberculosis significantly alters lung volumes, with variations observed based on disease stage and clinical presentation.
Advanced TB is associated with reduced total and vital lung capacity.
Incipient TB can present with diverse lung volume profiles, sometimes indicating underlying clinical complications.