The ring sensor: a new ambulatory wearable sensor for twenty-four hour patient monitoring

This paper describes the development of a ring sensor for twenty-four hour patient monitoring. The ring is packed with LEDs and photodetectors where the technology of pulse oximetry is implemented for blood oxygen saturation monitoring. The measured data are transmitted to a computer through a digital wireless communication link. The ring sensor is worn by the patient at all times, hence the health status is monitored 24 hours a day. Detailed descriptions of the hardware and the software of the ring sensor will be presented. Also, the effects of motion artifact and ambient light will be investigated.