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Sensors 2014, 14(9), 17586-17599;

Novel Wearable and Wireless Ring-Type Pulse Oximeter with Multi-Detectors

Institute of Imaging and Biomedical Photonics, National Chiao Tung University, Tainan 711, Taiwan
Department of Electronics Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan
Department of Medical Research, Chi-Mei Medical Center, Tainan 710, Taiwan
Author to whom correspondence should be addressed.
Received: 14 August 2014 / Revised: 9 September 2014 / Accepted: 17 September 2014 / Published: 19 September 2014
(This article belongs to the Collection Sensors for Globalized Healthy Living and Wellbeing)
Full-Text   |   PDF [6961 KB, uploaded 19 September 2014]


The pulse oximeter is a popular instrument to monitor the arterial oxygen saturation (SPO2). Although a fingertip-type pulse oximeter is the mainstream one on the market at present, it is still inconvenient for long-term monitoring, in particular, with respect to motion. Therefore, the development of a wearable pulse oximeter, such as a finger base-type pulse oximeter, can effectively solve the above issue. However, the tissue structure of the finger base is complex, and there is lack of detailed information on the effect of the light source and detector placement on measuring SPO2. In this study, the practicability of a ring-type pulse oximeter with a multi-detector was investigated by optical human tissue simulation. The optimal design of a ring-type pulse oximeter that can provide the best efficiency of measuring SPO2 was discussed. The efficiency of ring-type pulse oximeters with a single detector and a multi-detector was also discussed. Finally, a wearable and wireless ring-type pulse oximeter was also implemented to validate the simulation results and was compared with the commercial fingertip-type pulse oximeter. View Full-Text
Keywords: pulse oximeter; arterial oxygen saturation; finger base; optical human tissue simulation; multi-detector pulse oximeter; arterial oxygen saturation; finger base; optical human tissue simulation; multi-detector
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Huang, C.-Y.; Chan, M.-C.; Chen, C.-Y.; Lin, B.-S. Novel Wearable and Wireless Ring-Type Pulse Oximeter with Multi-Detectors. Sensors 2014, 14, 17586-17599.

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