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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 20 — Oct. 7, 2013
  • pp: 23058–23067

Adaptive pulse oximeter with dual-wavelength based on wavelet transforms

Shengjia Wang, Zhan Gao, Guangyu Li, and Ziang Feng  »View Author Affiliations

Optics Express, Vol. 21, Issue 20, pp. 23058-23067 (2013)

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Pulse oximeter is widely used in the monitoring of blood oxygen in clinic for its convenience and efficiency. However, synchronizing light source flashing with data collecting is required, otherwise the separation of the data from different LEDs will fail. More importantly, synchronous acquisition makes the pulse oximetry system vulnerable. Meanwhile, the pulse waveform extraction is a crucial procedure in the measurement. Hence, in this paper, an asynchronous acquisition pulse oximetry system based on wavelet transform has been built. PhotoPlethysmoGraph (PPG) and photoelectric detection technology are applied in our homemade system. The adaptive soft-threshold de-noising is realized by Stein's Unbiased Risk Estimate (SURE). The principle and system configuration are described. The preliminary experiment results from wavelet transforms and Fourier transforms are compared. The results show that our homemade system is adaptive, accurate, robust and simple.

© 2013 Optical Society of America

OCIS Codes
(000.3110) General : Instruments, apparatus, and components common to the sciences
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes
(220.1080) Optical design and fabrication : Active or adaptive optics

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: June 24, 2013
Revised Manuscript: September 10, 2013
Manuscript Accepted: September 12, 2013
Published: September 23, 2013

Shengjia Wang, Zhan Gao, Guangyu Li, and Ziang Feng, "Adaptive pulse oximeter with dual-wavelength based on wavelet transforms," Opt. Express 21, 23058-23067 (2013)

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