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Lung function in patients with inflammatory bowel disease

N Tzanakis1, D Bouros, M Samiou

  • 1Department of Thoracic Medicine, Medical School University of Crete, Greece.

Respiratory Medicine
|August 6, 1998
PubMed
Summary
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Pulmonary function tests (PFTs) show no significant differences between inflammatory bowel disease (IBD) patients and controls. However, reduced lung diffusion capacity for carbon monoxide (TLCO) is linked to active disease in both Crohn's disease and ulcerative colitis.

Area of Science:

  • Gastroenterology
  • Pulmonology
  • Internal Medicine

Background:

  • Conflicting data exists on pulmonary function testing (PFT) abnormalities in inflammatory bowel disease (IBD).
  • Previous studies often combined ulcerative colitis (UC) and Crohn's disease (CD) cohorts, potentially masking entity-specific findings.
  • Baseline PFTs in IBD patients require further investigation to identify subtle abnormalities.

Purpose of the Study:

  • To assess PFT abnormalities in a large cohort of IBD patients.
  • To compare PFT findings between UC and CD patients.
  • To investigate the relationship between PFT abnormalities and disease activity.

Main Methods:

  • 132 IBD patients (47 CD, 85 UC) underwent spirometry and lung transfer factor for carbon monoxide (TLCO) testing.

Related Experiment Videos

  • Results were compared to 36 healthy controls.
  • Disease activity was assessed and correlated with PFT results.

    • Main Results:

    • No significant differences in mean spirometric indices, TLCO, or arterial blood gas (ABG) values were observed between CD, UC, and control groups.
    • A significantly higher percentage of CD (19%) and UC (17.6%) patients exhibited reduced TLCO compared to controls (P < 0.05).
    • Reduced TLCO was predominantly observed in patients with active disease (P < 0.05).

    Conclusions:

    • Routine PFTs do not differentiate between UC, CD, and healthy individuals.
    • Reduced TLCO, indicative of impaired gas exchange, is more prevalent in IBD patients, particularly during active disease phases.
    • TLCO assessment may offer insights into subclinical pulmonary involvement in IBD, correlating with disease activity.