Single breath count: a simple pulmonary function test using a mobile app

Kumari, Akriti; Malik, Shikha; Narkeesh, Kanimozhi; Samuel, Asir John

doi:10.1007/s12055-017-0555-5

Cited by 9 publications

(11 citation statements)

References 4 publications

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“…In any case, both the MIP and the single breath count tests would be easily implementable and might be considered relevant to supplement standard assessment in COPD. 33 …”

Section: Discussionmentioning

confidence: 99%

Physiological changes related to 10 weeks of singing for lung health in patients with COPD

et al. 2022

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BackgroundSinging for Lung Health (SLH) was non-inferior to physical exercise training in improving 6-minute walking test distance (6MWD) and quality of life (St. George’s Respiratory Questionnaire (SGRQ)) within a 10-week pulmonary rehabilitation (PR) programme for COPD in our recent randomised controlled trial (RCT) (NCT03280355). Previous studies suggest that singing improves lung function, respiratory control and dyspnoea, however this has not yet been convincingly confirmed. Therefore, this study aimed to explore the impact of SLH on physiological parameters and the associations with achieving the minimal important difference (MID) in 6MWD and/or SGRQ.MethodsWe conducted post hoc, per-protocol analyses mainly of the SLH group of the RCT, exploring associations with 6MWD and SGRQ results by stratifying into achieving versus not-achieving 6MWD-MID (≥30 m) and SGRQ-MID (≤−4 points): changes in lung function, inspiratory muscle strength/control, dyspnoea, and heart rate response using logistic regression models. Further, we explored correlation and association in achieving both 6MWD-MID and SGRQ-MID (or in neither/nor) using Cohen’s κ and Cochran-Mantel-Haenszel Test.ResultsIn the SLH study group (n=108), 6MWD-MID was achieved by 31/108 (29%) and in SGRQ by 53/108 (49%). Baseline factors associated with achieving MID in either outcome included short baseline 6MWD and high body mass index. Achieving 6MWD-MID was correlated with improved heart rate response (OR: 3.14; p=0.03) and achieving SGRQ-MID was correlated with improved maximal inspiratory pressure (OR: 4.35; p=0.04). Neither outcome was correlated with significant spirometric changes. Agreement in achieving both 6MWD-MID and SGRQ-MID was surprisingly insignificant.ConclusionsThis explorative post hoc study suggests that SLH is associated with physiological changes after short-term PR for COPD. Future physiological studies will help us to understand the mechanisms of singing in COPD. Our study furthermore raises concern about poor agreement between subjective and objective benefits of PR despite state-of-the-art tools.

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“…In any case, both the MIP and the single breath count tests would be easily implementable and might be considered relevant to supplement standard assessment in COPD. 33 …”

Section: Discussionmentioning

confidence: 99%

Physiological changes related to 10 weeks of singing for lung health in patients with COPD

et al. 2022

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“…The counts were timed on a metronome set at a frequency of 2 counts per second using the Metronome Beats® Application, version 3.5.0 on a mobile based android operating system. 14 Three readings were recorded and the best of the three readings was considered for final analysis. A wash out period of 1-2 minutes was given between recording the readings to avoid fatigue.…”

Section: Sbcmentioning

confidence: 99%

Correlation of peak expiratory flow rate and single breath count in normal adults

2021

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Background: Spirometry mandates the requirement of equipments and skilled technicians which may be difficult to acquire in resource limited situations. Thus simple alternative tests like Peak Expiratory Flow Rate (PEFR) and Single Breath Count (SBC) can be used to assess the pulmonary functioning of an individual.Methods: Hundred healthy participants of both genders between the age group of 18-50 years were recruited for this study. They were asked to perform PEFR using the Mini Wright Peak Flow Meter and SBC using a metronome. Three reading were noted and the best of three readings were used for analysis.Results: The mean age and BMI of the participants were 31.54±10.42 years and 23.88±5.14 kg/m2 respectively. The Spearman’s correlation coefficient of PEFR and SBC was 0.7048 with p<0.001 indicating a strong positive correlation.Conclusions: SBC can be used as a simple, convenient and cost-effective alternative to PEFR to assess pulmonary function in adults.

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“…The counts were timed on a metronome set at a frequency of 2 counts per second using the Metronome Beats ® application, version 3.5.0 on a mobile based android operating system. 8 Three readings were recorded and the best of the three readings was considered for final analysis.…”

Section: Sbcmentioning

confidence: 99%

Effect of physiotherapy on single breath count and breath holding time in COVID-19 patients

et al. 2021

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Background: The novel Coronavirus is known to primarily affect the respiratory system and physiotherapy treatment is integral to combat this infection. However, the assessment of pulmonary function poses a difficult challenge considering the risk of spread of infection and sanitisation of the devices used. Single breath count (SBC) and breath holding time (BHT) can be thus adopted as bedside assessment tests for pulmonary function following physiotherapy treatment.Method: In this a retrospective observational study of 51 COVID-19 patients, mean age 51.7±14.56 years, on room air, admitted in the step-down units of a tertiary care hospital. Patients received standard physiotherapy treatment, within safe hemodynamic limits. Pre and post treatment session SBC was recorded in 32 patients and BHT in 19 patients. Three reading were noted and the best of three readings were used for analysis.Results: The paired t test was used to analyse SBC and BHT. Mean pre and post SBC was 18.25±8.96 and 23.31±9.96 respectively with a mean difference of 5.06 and p<0.0001. Mean pre and post BHT were 19.37 and 23.05 seconds respectively with a mean difference of 3.68 and p<0.0001. Statistically significant difference in the pre and post treatment session SBC and BHT was observed, indicating a positive effect of physiotherapy treatment on pulmonary function.Conclusion: Physiotherapy treatment shows significant improvement in the pulmonary function in COVID-19 patients. SBC and BHT tests can be used as assessment and prognostic tools for pulmonary function in COVID-19 patients.

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Single breath count: a simple pulmonary function test using a mobile app

Cited by 9 publications

References 4 publications

Physiological changes related to 10 weeks of singing for lung health in patients with COPD

Physiological changes related to 10 weeks of singing for lung health in patients with COPD

Correlation of peak expiratory flow rate and single breath count in normal adults

Effect of physiotherapy on single breath count and breath holding time in COVID-19 patients

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