Novel wearable and wireless ring-type pulse oximeter with multi-detectors

Cheng Yang Huang, Ming-Che Chan, Chien Yue Chen, Bor-Shyh Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


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.

Original languageEnglish
Pages (from-to)17586-17599
Number of pages14
JournalSensors (Switzerland)
Issue number9
StatePublished - 1 Jan 2014


  • Arterial oxygen saturation
  • Finger base
  • Multi-detector
  • Optical human tissue simulation
  • Pulse oximeter


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