This paper discusses the design and development of low-cost and longer battery life wireless pulse oximetry system. The design combined a low-power analog sensor circuit with a software DSP system and a low-power wireless transceiver. The FFT algorithm was used to process the filtered signals for accurate calculations of %SpO2 and beats per minute(bpm). The prototype device connected to a Windows PC via USB. The patient parameters i.e. %SpO2 and bpm were continuously measured and transferred to a central monitoring station via a wireless sensor network for display. The system provided several advantages over existing models, primarily adding longer battery life and low unit cost. The system performed very satisfactorily and has been successfully implemented.

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