Combination of multiple light paths in pulse oximetry: the finger ring example
1Swiss Center for Electronics and Microtechnology (CSEM), Neuchâatel, Switzerland. jsa@csem.ch
Summary
Developing a novel finger ring pulse oximeter requires new optical strategies. This study presents a combined short and long light path design to overcome challenges in measuring blood oxygen saturation (SpO2) outside the fingertip.
Area of Science:
- Biomedical Engineering
- Optical Sensing Technologies
Background:
- Traditional pulse oximetry is limited to fingertip measurements.
- Alternative body sites require adapted optical setups and signal processing.
Purpose of the Study:
- To develop a novel finger ring sensor for pulse oximetry.
- To address challenges in optical design and signal handling for non-fingertip SpO2 monitoring.
Main Methods:
- Implementation of a combined short and long light path optical design.
- Development of advanced signal processing techniques for SpO2 estimation.
Main Results:
- Successfully resolved issues associated with non-fingertip pulse oximetry.
- Demonstrated the feasibility of a finger ring SpO2 sensor.
Conclusions:
- The proposed optical and signal handling strategies enable effective pulse oximetry at alternative body sites.
- A finger ring sensor is a viable alternative for SpO2 monitoring.
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