Fraction of exhaled nitric oxide measurements in the diagnoses of asthma in elderly patients
Authors Netto ACMG, dos Reis TG, Matheus CF, Aarestrup BJV, Aarestrup F
Received 19 August 2015
Accepted for publication 3 December 2015
Published 12 May 2016 Volume 2016:11 Pages 623—629
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Richard Walker
Antonio Carlos Maneira Godinho Netto,1,2 Túlio Gonçalves dos Reis,1,2 Cássia Franco Matheus,1,2 Beatriz Julião Vieira Aarestrup,3,4 Fernando Monteiro Aarestrup1,2,4
1School of Medical and Health Sciences – SUPREMA, 2Maternity Hospital Terezinha de Jesus, 3Morphology Department, Federal University of Juiz de Fora, Institute of Biological Sciences, 4Laboratory of Immunopathology and Experimental Pathology, Federal University of Juiz de Fora, Reproductive Biology Center (CBR), Juiz de Fora, Brazil
Objective: To assess the value of fraction of exhaled nitric oxide (FeNO) measurements in the diagnosis of asthma in elderly patients.
Methods: The clinical symptoms of 202 elderly patients were assessed with the asthma module of the International Study of Asthma and Allergies in Childhood test, which had been modified for the elderly patients, and the diagnostic routine for chronic obstructive pulmonary disease (COPD), which was based on the Global initiative for chronic Obstructive Lung Disease criteria. Of the 202 patients assessed, 43 were subjected to pulmonary function evaluations (spirometry) and FeNO measurements.
Results: Of the 202 elderly patients, 34 had asthma (23 definite and eleven probable), 20 met COPD criteria, 13 presented with an overlap of asthma and COPD, and 135 did not fit the criteria for obstructive pulmonary disease. Among the 43 elderly patients who were subjected to FeNO measurements, ten showed altered results (23.2%) and 33 had normal results (76.7%). The average value of FeNO in patients with definite and probable asthma undergoing this procedure was 29.2 parts per billion whereas that in nonasthmatic patients was 17.5 parts per billion (P=0.0002).
Conclusion: We show a clear relationship between FeNO levels and asthma symptoms and previous asthma diagnoses in elderly patients.
Keywords: asthma, chronic obstructive pulmonary disease, elderly patients, nitric oxide
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