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Photoplethysmography (PPG) is a technique widely used to monitor volumetric blood changes induced by cardiac pulsations. Pulse oximetry uses the technique of PPG to estimate arterial oxygen saturation values ( $$\hbox{SpO}_2$$ ). In poorly perfused tissues, $$\hbox{SpO}_2$$ readings may be compromised due to the poor quality of the PPG signals. A multimode finger PPG probe that operates simultaneously...
Pulse oximetry utilises the technique of photople-thysmography (PPG) to estimate arterial oxygen saturation values (SpO2). In poorly perfused tissues, SpO2 readings may be compromised due to the poor quality of the PPG signals. In order to investigate further the threshold where pulse oximetry fails to produce accurate SpO2 values, we have developed a custom made multimode finger pulse oximetry probe...
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