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An autocorrelation modeling method for oxygen saturation measurement during low perfusion

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Abstract

Background

SpO2 is a widely used estimation of oxygen saturation owing to its convenient usage and low cost. However, SpO2 determination under low perfusion condition is severely affected by noise.

Methods

In this paper, an autocorrelation modeling method for the oxygen saturation measurement during low perfusion is presented. The proposed method mainly contains two steps: calculating the autocorrelation of the photoplethysmography (PPG) signals and modeling for the parameter calculation. The autocorrelation of the PPG signals can suppress the noise and extract pulse waves from low perfusion signals. The model can realize the calculation of SpO2 with the autocorrelation signals.

Results

Experiments showed that the new method had a good accuracy and stability under low perfusion condition (perfusion index (PI) ≤ 0.2%), and it was also motion-tolerant. Meanwhile, the new method showed a good performance for the oxygen saturation measurement under the condition of lower perfusion (PI = 0.1%).

Conclusions

The new method could realize the calculation of SpO2 by little computation and high efficiency without extra hardware. It has strong potential in real-time clinical use.

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Data availability

All data generated and analyzed during this study are included in this published article, and any further details of this study are available from the corresponding author on reasonable request.

Code availability

Not applicable.

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Author notes

  1. Shuangping Tan, Jie Wei, and Hao Chen contributed equally to this work.

Authors and Affiliations

  1. The First People’s Hospital of Jiangxia District Wuhan, Jiangxia District, No. 1 Wenhua Avenue, Wuhan, 430200, China

    Shuangping Tan, Jie Wei, Hao Chen, Xiali Wu, Youfeng Deng & Hongbin Zuo

  2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, China

    Tong Zhang

Authors
  1. Shuangping Tan
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  2. Jie Wei
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  3. Hao Chen
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  4. Tong Zhang
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  5. Xiali Wu
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  6. Youfeng Deng
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  7. Hongbin Zuo
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Contributions

Shuangping Tan designed the method described in this manuscript and designed the experiment to verify the method and was the major contributor in writing the manuscript. Jie Wei and Hao Chen analyzed and interpreted the experiment data, and also contributed to the writing of the manuscript. Tong Zhang, Youfeng Deng, and Hongbin Zuo provided a lot of help for the experimental method and writing of this paper. Xiali Wu analyzed and interpreted the experiment data. All the authors read and approved the final manuscript.

Corresponding authors

Correspondence to Shuangping Tan or Hongbin Zuo.

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Tan, S., Wei, J., Chen, H. et al. An autocorrelation modeling method for oxygen saturation measurement during low perfusion. Res. Biomed. Eng. 38, 1103–1111 (2022). https://doi.org/10.1007/s42600-022-00244-w

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  • DOI: https://doi.org/10.1007/s42600-022-00244-w

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