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Exhaled breath condensate pH in the evaluation of asthma

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As a marker of inflammation, exhaled breath condensate (EBC) pH may be a useful screening tool in the evaluation of asthma, especially in a military recruit population. To evaluate the utility of EBC pH in the diagnosis of asthma, EBC pH levels were determined in basic military trainees prior to an evaluation for asthma that included a history, physical exam, baseline spirometry, and a methacholine or exercise challenge. Of 86 basic trainees who had symptoms suggestive of asthma and underwent methacholine or exercise challenges, 51 (59.3%) had a positive methacholine or exercise challenge and were diagnosed with asthma. The mean EBC pH of the trainees who were diagnosed with asthma (6.39, range 5.91–6.82), was significantly (p < 0.001) lower than those trainees without asthma (6.64, range 6.34–7.18). There was, however, some overlap of the EBC pH values between the two groups. The measurement of EBC pH did show a significant mean difference between asthmatic and nonasthmatic patients in a military recruit population.
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Keywords: Asthma; breath; condensate; evaluation; exhaled; pH; patient

Document Type: Research Article

Affiliations: 59 Medical Wing/MMIA, Lackland AFB, Texas

Publication date: 01 January 2008

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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