Name
Title | ||
|---|---|---|
Employing an Incentive Spirometer to Calibrate Tidal Volumes Estimated from a Smartphone Camera. |
Abstract | ||
|---|---|---|
A smartphone-based tidal volume (V-T) estimator was recently introduced by our research group, where an Android application provides a chest movement signal whose peak-to-peak amplitude is highly correlated with reference V-T measured by a spirometer. We found a Normalized Root Mean Squared Error (NRMSE) of 14.998% +/- 5.171% (mean +/- SD) when the smartphone measures were calibrated using spirometer data. However, the availability of a spirometer device for calibration is not realistic outside clinical or research environments. In order to be used by the general population on a daily basis, a simple calibration procedure not relying on specialized devices is required. In this study, we propose taking advantage of the linear correlation between smartphone measurements and V-T to obtain a calibration model using information computed while the subject breathes through a commercially-available incentive spirometer (IS). Experiments were performed on twelve (N = 12) healthy subjects. In addition to corroborating findings from our previous study using a spirometer for calibration, we found that the calibration procedure using an IS resulted in a fixed bias of -0.051 L and a RMSE of 0.189 +/- 0.074 L corresponding to 18.559% +/- 6.579% when normalized. Although it has a small underestimation and slightly increased error, the proposed calibration procedure using an IS has the advantages of being simple, fast, and affordable. This study supports the feasibility of developing a portable smartphone-based breathing status monitor that provides information about breathing depth, in addition to the more commonly estimated respiratory rate, on a daily basis. |
Year | DOI | Venue |
|---|---|---|
2016 | 10.3390/s16030397 | SENSORS |
Keywords | Field | DocType |
breathing monitor,smartphone camera,incentive spirometer,calibration,tidal volume | Population,Tidal volume,Spirometer,Simulation,Mean squared error,Breathing,Engineering,Incentive spirometer,Calibration,Estimator | Journal |
Volume | Issue | ISSN |
16 | 3.0 | 1424-8220 |
Citations | PageRank | References |
1 | 0.39 | 5 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Bersain A. Reyes | 1 | 80 | 10.26 |
| Natasa Reljin | 2 | 11 | 1.78 |
| Youngsun Kong | 3 | 11 | 4.68 |
| Yunyoung Nam | 4 | 13 | 1.81 |
| Sangho Ha | 5 | 1 | 0.39 |
| Ki H Chon | 6 | 85 | 13.24 |