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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

334
Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
334
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  11. Use Of 6-minute Walk Distance To Predict Lung Transplant-free Survival In Fibrosing Non-ipf Interstitial Lung Diseases

Use of 6-minute walk distance to predict lung transplant-free survival in fibrosing non-IPF interstitial lung diseases

Umberto Zanini1,2, Fabrizio Luppi1, Karina Kaur2

  • 1Department of Medicine and Surgery, University of Milan-Bicocca, SC Pneumologia, Fondazione IRCCS "San Gerardo dei Tintori", Monza, Italy.

Respirology (Carlton, Vic.)
|February 6, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Six-minute walk distance (6MWD) decline accurately predicts survival in fibrosing interstitial lung diseases (ILDs), independent of lung function. This simple test can improve progression assessment for patients with ILDs.

Area of Science:

  • Pulmonology
  • Clinical Medicine
  • Respiratory Research

Background:

  • Assessing disease progression in fibrosing interstitial lung diseases (ILDs), particularly idiopathic pulmonary fibrosis (IPF), is clinically challenging.
  • Lung function decline alone has limitations in detecting clinically significant progression.
  • Longitudinal changes in 6-minute walk distance (6MWD) may offer independent predictive value for survival and disease progression when considered alongside lung function measures.

Purpose of the Study:

  • To investigate if longitudinal changes in 6-minute walk distance (6MWD), combined with lung function measures, can independently predict survival in patients with fibrosing ILDs.
  • To determine the accuracy of 6MWD decline in identifying clinically significant disease progression compared to established functional criteria.

Main Methods:

Keywords:
6MWD6‐minute walk distanceexercise capacityinterstitial lung disease

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  • Evaluated forced vital capacity (FVC), diffusing lung capacity (DLCO), and 6MWD at baseline and 1-year follow-up in discovery (n=105) and validation (n=138) cohorts.
  • Primary endpoint was lung transplant (LTx)-free survival, with an average follow-up of 3 years.
  • Analyzed longitudinal changes and their correlation with survival, controlling for baseline severity and other clinical factors.

Main Results:

  • A decline in 6MWD ≥24 meters significantly and independently predicted LTx-free survival with high accuracy in both cohorts.
  • While FVC and DLCO declines were also significant predictors, 6MWD decline demonstrated superior accuracy compared to current ATS/ERS/JRS/ALAT criteria.
  • No collinearity was observed between longitudinal changes in FVC, DLCO, and 6MWD, indicating their independent contributions.

Conclusions:

  • Longitudinal 6MWD decline is a highly accurate, independent predictor of poor survival in fibrosing ILDs across various baseline severities.
  • The 6MWD test offers a valuable, easily integrated tool for routine assessment of disease progression in ILDs.
  • This finding supports the incorporation of 6MWD changes into clinical practice for better patient management and prognostic evaluation.
prognosis
progressive pulmonary fibrosis
survival