Home monitoring of breathing rate in people with chronic obstructive pulmonary disease: observational study of feasibility, acceptability, and change after exacerbation

Figures

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  Figure 1. Validation of BR in a laboratory setting for five monitors. Notes: Bland and Altman plots between Oxicon® BR output and different monitors BR outputs. Solid lines represent the bias, and dotted lines represent 95% limits of prediction. Abbreviations: Accel, accelerometer; bpm, breath per minute; BR, breathing rate; PPG, photoplethysmography.

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  Figure 2. Plots of the mean Oxicon® BR output against the mean output for the other monitors when comparing resting (sitting) with combined activities (fast 6MWT, slow 6MWT, sweeping, and lifting). Abbreviations: 6MWT, 6 minute walking test; bpm, breath per minute; PPG photoplethysmography; BR, breathing rate.

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  Figure 3. Evolution of BR shows the overall patient evolution of the BR during the recovery. Abbreviation: BR, breathing rate.

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  Figure 4. Example of patients during the monitoring period. Notes: Panel (A) shows patients 6 and 9 who showed improvements during the recovery process in BR and Panel (B) is an example of a patient who did not show improvements. Abbreviations: bpm, breath per minute; BR, breathing rate.

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  Figure 5. Monitored patients 3 and 4 during two cycles of AECOPD. Abbreviations: bpm, breath per minute; BR, breathing rate; AECOPD, exacerbations of chronic obstructive pulmonary disease; RR, respiratory rate.