Signal processing methods for pulse oximetry☆
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New pulse oximetry detection based on the light absorbance ratio as determined from amplitude modulation indexes in the time and frequency domains
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2019, Medical Engineering and PhysicsCitation Excerpt :Although being a volumetric measure and not a direct measurement of the pulse pressure, thanks to the strict relationship between changes in arterial pressure and volume and its non-invasivity, it is commonly employed for arterial stiffness evaluation. PPG is often performed in a transmission modality on the fingers or toes, allowing the assessment of both arterial oxygen saturation and single wavelength pulse wave contour [17]. Thanks to the high diffusive properties of biological tissues within NIR spectral range [18], PPG measurements can also be performed in a back-reflection modality where the light source and detector are located on the same surface at a certain distance from one another (few centimeters).
The Correlation Between Finger Mean Arterial Pressure and Blood Pressure Measurement
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This research work was supported in part by a grant from Group Technologies, Inc.