Assessing the Correlation between the Results of Single Breath Counting and Peak Expiratory Flow Rate in Evaluation of pulmonary function among Patients Presenting to the Emergency Department with Acute Asthma Attack
Iranian Journal of Emergency Medicine,
Vol. 9 No. 1 (2022),
Introduction: Asthma is a chronic disease usually characterized by periodic wheezing, coughs, and shortness of breath as a result of hyper responsiveness and inflammation of the airway. The purpose of this study was to assess the correlation between the results of single breath counting and peak expiratory flow rate methods in evaluation of pulmonary function among patients presenting to the emergency department with acute asthma attack.
Methods: This cross-sectional study was performed on 33 patients with complaint of acute asthma attack before and after the initial treatment, peak flowmetry, and Single Breath Counting (SBC) were performed. A checklist including age, sex, respiratory rate, blood oxygen saturation, asthma severity, SBC, and Peak Expiratory Flow Rate (PEFR) was filled out before and after treatment. Statistical analysis was performed to evaluate the relationship between data using SPSS v.26.
Results: 33 patients, including 13 women and 20 men with the mean age of 32.39 ± 10.58 years were studied. Statistical analysis showed a significant direct linear relationship between SBC and PEFR before and after treatment, percentage of oxygen saturation changes, and between percentage of SBC changes with PEFR (r = 0.933, r = 0.915, and r = 0.892, respectively) and a significant inverse linear relationship was observed between PEFR and SBC with asthma severity (P <0.05). There was no significant inverse linear relationship between SBC and the percentage of changes in respiratory rate (r = -0.279, P> 0.05).
Conclusion: The results can indicate the competency of SBC to replace PEFR in evaluation of pulmonary function in adult patients presenting to the emergency department with acute asthma attack.
- Single breath counting
- Peak expiratory flow rate
- Respiratory function tests
How to Cite
Wu TD, Brigham EP, McCormack MC. Asthma in the primary care setting. Medical Clinics. 2019;103(3):435-52.
Jameson JL, Kasper DL, Fauci AS, Hauser SL, Longo DL, Loscalzo J. Harrison's principles of internal medicine: McGraw-hill education; 2018.
Tsai C-L, Clark S, Camargo Jr CA. Risk stratification for hospitalization in acute asthma: the CHOP classification tree. The American journal of emergency medicine. 2010;28(7):803-8.
Marx J, Hockberger R, Walls R. Rosen's Emergency Medicine-Concepts and Clinical Practice E-Book: 2-Volume Set: Elsevier Health Sciences; 2013.
Hasegawa K, Craig SS, Teach SJ, Camargo Jr CA. Management of asthma exacerbations in the emergency department. The Journal of Allergy and Clinical Immunology: In Practice. 2021;9(7):2599-610.
Avery W. Maximizing spirometry in reversible airways diseases. Annals of allergy. 1981;47(5 Pt 2):410-4.
Ushkow BS, Bartfield JM, Reicho PR, Raccio-Robak N. Single-breath counting for the assessment of bronchospastic patients in the ED. The American journal of emergency medicine. 1998;16(1):100-1.
Ali SS, O’Connell C, Kass L, Graff G. Single-breath counting: a pilot study of a novel technique for measuring pulmonary function in children. The American journal of emergency medicine. 2011;29(1):33-6.
Rega PP, Bork CE, Burkholder-Allen K, Bisesi MS, Gold JP. Single-Breath-Count Test: an important adjunct in the triaging of patients in a mass-casualty incident due to botulism. Prehospital and Disaster Medicine. 2010;25(3):219-22.
Kass LE, Putnam K. Single breath counting for the evaluation of pediatric respiratory function: derivation of a “normogram”. Internal and emergency medicine. 2016;11(2):225-8.
O’Byrne PM, Reddel HK, Eriksson G, Östlund O, Peterson S, Sears MR, et al. Measuring asthma control: a comparison of three classification systems. European Respiratory Journal. 2010;36(2):269-76.
Nowak RM, Pensler MI, Sarkar DD, Anderson JA, Kvale PA, Ortiz AE, et al. Comparison of peak expiratory flow and FEV1 admission criteria for acute bronchial asthma. Annals of Emergency medicine. 1982;11(2):64-9.
Bartfield JM, Ushkow BS, Rosen JM, Dylong K. Single breath counting in the assessment of pulmonary function. Annals of emergency medicine. 1994;24(2):256-9.
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