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A Multi-Wavelength Opto-Electronic Patch Sensor to Effectively Detect Physiological Changes against Human Skin Types.

Liangwen Yan1, Sijung Hu2, Abdullah Alzahrani3,4

  • 1School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China. lw_yan@staff.shu.edu.cn.

Biosensors
|June 22, 2017
PubMed
Summary

A new multi-wavelength opto-electronic patch sensor (OEPS) accurately measures heart rate (HR) across diverse skin tones. This innovation overcomes limitations of current sensors, enabling reliable physiological monitoring for all ethnic groups.

Keywords:
Von Luschan’s chromatic scale (VLCS)auto adaptive adjustmentmulti-wavelengthopto-electronic patch sensor (OEPS)skin pigments

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Area of Science:

  • Biomedical Engineering
  • Physiological Measurement
  • Optoelectronics

Background:

  • Skin pigmentation variations affect optical signal acquisition for physiological monitoring.
  • Existing photoplethysmographic (PPG) sensors face challenges in accurately capturing signals across different ethnic skin types.
  • Developing robust sensors is crucial for equitable health monitoring.

Purpose of the Study:

  • To develop and validate a multi-wavelength opto-electronic patch sensor (OEPS) for reliable in vivo physiological measurements.
  • To optimize OEPS illumination wavelengths for compatibility with various skin pigments.
  • To assess the OEPS's performance across different skin types and activities.

Main Methods:

  • Designed a novel multi-wavelength opto-electronic patch sensor (OEPS) with optimized electronic architecture.
  • Developed a protocol involving 33 healthy males (ages 18-41) representing five skin types (Von Luschan's scale).
  • Evaluated OEPS performance during various activities to measure heart rate (HR) reliably.

Main Results:

  • No significant differences (p: 0.09, F = 3.0) in measurement reliability were observed across the five tested skin types.
  • The OEPS demonstrated consistent physiological measurements irrespective of skin pigmentation.
  • The multi-wavelength illumination effectively captured heart rate signals across diverse skin tones.

Conclusions:

  • The developed OEPS, utilizing multi-wavelength illumination, provides a cost-effective solution for accurate health monitoring across diverse ethnic groups.
  • This technology overcomes skin pigment-related limitations in current PPG sensors.
  • OEPS offers a promising pathway for inclusive and accessible physiological monitoring applications.