LED duty cycle reduction and light power minimization can reduce overall LED power consumption in ambulatory pulse oximetry monitors, constrained by optical components and required SpO2 accuracy.
The study provides a technical framework for minimizing LED power consumption in ambulatory pulse oximeters while maintaining the required SpO2 reading accuracy.
The development of ambulatory arterial pulse oximetry is key to longer term monitoring and treatment of cardiovascular and respiratory conditions. The investigation presented in this paper will assist the designer of an ambulatory pulse oximetry monitor in minimizing the overall LED power consumption (P LED,TOT) levels by analyzing the lowest achievable limit as constrained by the optical components, circuitry implementation and final SpO2 reading accuracy required. LED duty cycle (D LED) reduction and light power (P LED,ON) minimization are proposed as methods to reduce P LED,TOT. Bandwidth and signal quality calculations are carried out in order to determine the required P LED,TOT as a function of the different noise sources.
Pelaez et al. (Wed,) conducted a other in cardiovascular and respiratory conditions. LED power reduction methods (duty cycle reduction and light power minimization) was evaluated on LED power consumption (P LED,TOT) levels and SpO2 reading accuracy. LED duty cycle reduction and light power minimization can reduce overall LED power consumption in ambulatory pulse oximetry monitors, constrained by optical components and required SpO2 accuracy.
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