Journal ArticleDOI
A Novel Calibration-Free Method of Measurement of Oxygen Saturation in Arterial Blood
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TLDR
A novel method of computation of SpO2 that does not require the use of a calibration curve is presented, based on a model for the attenuation of light through skin, tissue, bone, and blood, that becomes free of not only patient but sensor-dependent parameters as well.Abstract:
In present-day pulse oximeters, oxygen saturation in arterial blood (SpO2) is computed by utilizing an empirical relationship extracted from a calibration curve. The calibration curve is obtained by curve-fitting data acquired from volunteers. A novel method of computation of SpO2 that does not require the use of a calibration curve is presented in this paper. Based on a model for the attenuation of light through skin, tissue, bone, and blood, suitable processing steps are identified so that the analytical expression derived for the estimation of SpO2 becomes free of not only patient but sensor-dependent parameters as well. The experimental results presented in this paper establish the efficacy of the proposed method.read more
Citations
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Journal ArticleDOI
A Novel Approach for Motion Artifact Reduction in PPG Signals Based on AS-LMS Adaptive Filter
TL;DR: The merit of the method is clearly demonstrated using convergence and correlation analysis, thus making it best suitable for present-day pulse oximeters utilizing PPG sensor head with a single pair of source and detector, which does not have any extra hardware meant for capturing noise reference signal.
Journal ArticleDOI
Pulse oximetry: fundamentals and technology update
TL;DR: The accuracy of SpO2 measurement is insufficient in several situations, such as critically ill patients receiving supplemental oxygen, and can be hazardous if it leads to elevated values of oxygen partial pressure in blood.
Journal ArticleDOI
A Motion-Tolerant Adaptive Algorithm for Wearable Photoplethysmographic Biosensors
TL;DR: A novel real-time adaptive algorithm is proposed for accurate motion-tolerant extraction of heart rate and pulse oximeter oxygen saturation from wearable photoplethysmographic (PPG) biosensors and provides noise-free PPG waveforms for further feature extraction.
Journal ArticleDOI
Body Sensor Network for Mobile Health Monitoring, a Diagnosis and Anticipating System
Johan Wannenburg,Reza Malekian +1 more
TL;DR: The system is capable of health monitoring through accurate measurements, providing the user with feedback and successfully identifying medical stress resulting in the sending of a notification to a medical doctor.
Proceedings ArticleDOI
Evaluation of wavelets for reduction of motion artifacts in photoplethysmographic signals
TL;DR: Test results reveal that the estimated Spo2 values from MA reduced PPGs using different wavelets are very close to each other, establishing that the Daubechies wavelet is the most preferred wavelet for pulse oximetry applications.
References
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BookDOI
Design of Pulse Oximeters
TL;DR: In this paper, the authors present a user interface for a pulse oximeter, based on an interface provided by Lozano-Nieto and Schowalter, with a discussion of the application of pulse oximetry.
Journal ArticleDOI
Pulse oximetry: Principles and limitations
TL;DR: The principles of pulse oximetry are reviewed, with an eye toward recognizing the limitations of this tool, which include performance limitations in the settings of carboxyhemoglobinemia, methemoglobeinema, motion artifact, hypotension, vasoconstriction, and anemia.
PulseOximetry:Theoryand Applications for Noninvasive Monitoring
TL;DR: Pulse oximeters compute arterial oxygen saturation (SaO2) by measuring differences in the visible and near infrared absorbances of fully oxygenated and deoxygenated arterial blood.
Journal ArticleDOI
Pulse oximetry: theory and applications for noninvasive monitoring.
TL;DR: The theoretical background behind this advanced technology, instrumentation requirements, practical instrument calibration, common features of commercial pulse oximeters, specific clinical applications, and performance limitations of pulse oximeter are reviewed.
Journal ArticleDOI
Signal processing methods for pulse oximetry
TL;DR: The results indicate that the FFT and DCT computation of oxygen saturation were as accurate without averaging, as weighted moving average (WMA) algorithms currently being used, and directly indicate when erroneous calculations occur.