Combination of multiple light paths in pulse oximetry: the finger ring example

@article{Sol2007CombinationOM,
  title={Combination of multiple light paths in pulse oximetry: the finger ring example},
  author={Josep Sol{\`a} and Olivier Ch{\'e}telat},
  journal={2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society},
  year={2007},
  pages={6697-6698}
}
When pulse oximetry is required at other body locations than the finger tip new strategies for optical setups and signal handling are required. In this paper we present a combination of short and long light paths that succeeded in resolving the problems associated to the development of a finger ring SpO2 sensor.