Proceedings of the Korea Information Processing Society Conference (한국정보처리학회:학술대회논문집)

  • 2015.10a
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  • Pages.578-579
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  • 2015
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  • 2005-0011(pISSN)
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  • 2671-7298(eISSN)
Korea Information Processing Society (한국정보처리학회)
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A Wearable Watch-type Reflectance-based Blood-oxygen Saturation (SpO2) Level Estimation

반사광을 이용한 손목시계형 혈중산소포화도 (SpO2) 측정기

  • Lee, Hooseok (Dept. of Biomedical Engineering, Wonkwang University School of Medicine) ;
  • Thap, Tharoeun (Dept. of Biomedical Engineering, Wonkwang University School of Medicine) ;
  • Lee, Jinseok (Dept. of Biomedical Engineering, Wonkwang University School of Medicine)
  • Published : 2015.10.28
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Abstract

Transmission and reflectance are two non-invasive techniques to perform pulse oximetry. This paper presents a design of reflectance-based pulse oximetry for watch-type wearable device, in which sensor and detector are located on the same surface of the body part. The basic principle of a pulse oximeter is based on the measurement of the red and infrared (IR) light absorption. Oxygenated blood has significant differences of light absorption characteristics than deoxygenated blood under red (660 nm) and infrared (940 nm) wavelength. Infrared is absorbed more by oxygenated hemoglobin than red. So the hardware implementation is included placing of the two LEDs (red and IR) with single photo-detector in the middle on the patient's wrist to get the corresponding pulsatile signals which are used to estimate the $SpO_2$.

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