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Updated: Jul 10, 2026

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Bronchoalveolar Lavage (BAL) for Research; Obtaining Adequate Sample Yield
Published on: March 24, 2014
Bronchoalveolar lavage as a research tool
Anthony S Rose1, Kenneth S Knox
1Division of Pulmonary and Critical Care Medicine, Indiana University Medical Center, Indianapolis, Indiana, USA.
Seminars in Respiratory and Critical Care Medicine
|November 3, 2007
Summary
Bronchoalveolar lavage (BAL) is a safe research tool in pulmonary medicine. Advances like flow cytometry enhance understanding of lung diseases, identifying new biomarkers and therapies.
Area of Science:
- Pulmonary Medicine
- Immunology
- Medical Technology
Background:
- Bronchoalveolar lavage (BAL) has been a key research method in pulmonary medicine for 40 years.
- Numerous studies confirm the safety of BAL procedures for research participants.
- The lung is increasingly recognized as an accessible site for monitoring mucosal immunity.
Purpose of the Study:
- To review the historical use and evolving role of BAL in pulmonary research.
- To highlight the impact of new technologies, like flow cytometry, on understanding pulmonary diseases.
- To discuss the future potential of BAL in identifying disease biomarkers and therapeutic targets.
Main Methods:
- Literature review of studies utilizing bronchoalveolar lavage (BAL) over the past 40 years.
- Analysis of the integration of advanced technologies, such as flow cytometry, with BAL.
- Discussion of the conceptual shift towards viewing the lung as a site for immune monitoring.
Main Results:
- BAL is a well-established and safe procedure for pulmonary research.
- Technological advancements have significantly improved insights into pulmonary disease mechanisms.
- The lung's role in monitoring local immune responses and treatment efficacy is increasingly appreciated.
Conclusions:
- BAL remains a valuable tool in pulmonary medicine research.
- Technological integration promises deeper understanding and clinical relevance.
- Future research will likely uncover novel biomarkers and therapeutic strategies for lung diseases.

