The Respiration Rate is the number of breaths a person takes per minute (BRPM). Corsano Bracelet utilizes a proprietary time-frequency algorithm to extract the respiratory-induced intensity, amplitude and frequency variation signals from the photoplethysmography (PPG) signal.
The accelerometer (ACC) is used to compensate for movement artifacts. PPG and ACC are measured at 32Hz and data is processed by the algorithm to give a new reading of Respiration Rate every 28 seconds applying averaging to smooth pulse rate data and prevent inappropriate and transient artifacts from affecting stability of results.
Validation
The accuracy of Corsano Bracelet Respiration Rate measurement was determined by Complementair Medisch Centrum (CMC) Europe, Belgium in accordance with ISO 80601-2-55.
Bland Altman RR vs Capnograph
Specification of Respiration Rate
| Sensing Method | PPG, ACC |
| Measurement Range | 6 brpm – 60 brpm |
| Resolution | 1 brpm |
| Bias | Overall: 0.03 (0.02 – 0.04) brpm |
| Upper LoA | Overall: 1.82 (1.81 – 1.83) brpm |
| Lower LoA | Overall: -1.76 (-1.77 – -1.75) brpm |
| Data Update Period | 28 seconds |
| Apnea Detection | No |
| Accuracy | |
|---|---|
| Laying in supine position | +/- 1 Arms |
| Laying in prone position | +/- 2 Arms |
| Laying on the side | +/- 1 Arms |
| Sitting 90° position | +/- 2 Arms |
| Sitting 45° position | +/- 1 Arms |
| Standing upright | +/- 3 Arms |
| Shallow and fast breathing | +/- 1 Arms |