Journal: Biosensors

Article Title: Enabling Continuous Wearable Reflectance Pulse Oximetry at the Sternum

doi: 10.3390/bios11120521

Figure Lengend Snippet: Demographics and physiological responses during breath-hold of the subjects included in the analysis.

Article Snippet: The Biopac SpO 2 was further aligned to the biosensor signals on a per breath-hold basis, using the manual label described in .

Techniques:

Journal: Biosensors

Article Title: Enabling Continuous Wearable Reflectance Pulse Oximetry at the Sternum

doi: 10.3390/bios11120521

Figure Lengend Snippet: Feature extraction block diagrams. ( a ) Overview of the signal preprocessing and manual labeling pipeline. Extracted pairs of ratio of ratios (R) and SpO 2 were used for training and calibration of the model. T i,j denotes the delay found between R and SpO 2 for the j th breath-hold of subject i . The aligned data were displayed in the upper right scatter plot. The distribution of R and SpO 2 are also shown above and on the right of the scatter plot, respectively. IBI mean denotes the mean of the interbeat intervals (IBI) of a subject. ( b ) The block diagram for PPG beats segmentation, AC red/IR extraction, DC feature extraction, and PPG green -based outlier rejection.

Article Snippet: The Biopac SpO 2 was further aligned to the biosensor signals on a per breath-hold basis, using the manual label described in .

Techniques: Blocking Assay, Labeling

Journal: Biosensors

Article Title: Enabling Continuous Wearable Reflectance Pulse Oximetry at the Sternum

doi: 10.3390/bios11120521

Figure Lengend Snippet: Calibration analysis. ( a ) RMSE is reduced significantly with increasing calibration duration while fixing SpO 2 range. ( b ) RMSE does not change significantly with increasing SpO 2 range while fixing calibration duration. ns denotes not significant ( p > 0.05), and a single asterisk denotes significant differences ( p < 0.05) as determined by paired sample t -tests.

Article Snippet: The Biopac SpO 2 was further aligned to the biosensor signals on a per breath-hold basis, using the manual label described in .

Techniques: