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CLC number: TP206.1; R318.11

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Received: 2006-04-26

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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.6 P.916~920

http://doi.org/10.1631/jzus.2007.A0916


Investigation of blood pulse PPG signal regulation on toe effect of body posture and lower limb height


Author(s):  XIN Shang-zhi, HU Sijung, CRABTREE Vincent P., ZHENG Jia, AZORIN-PERIS Vincent, ECHIADIS Angelos, SMITH Peter R.

Affiliation(s):  College of Electrical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; more

Corresponding email(s):   xinsz@usst.edu.cn

Key Words:  Photoplethysmography (PPG), Non-invasive, Body posture, Blood pulse volume signal, Lower limb


XIN Shang-zhi, HU Sijung, CRABTREE Vincent P., ZHENG Jia, AZORIN-PERIS Vincent, ECHIADIS Angelos, SMITH Peter R.. Investigation of blood pulse PPG signal regulation on toe effect of body posture and lower limb height[J]. Journal of Zhejiang University Science A, 2007, 8(6): 916~920.

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author="XIN Shang-zhi, HU Sijung, CRABTREE Vincent P., ZHENG Jia, AZORIN-PERIS Vincent, ECHIADIS Angelos, SMITH Peter R.",
journal="Journal of Zhejiang University Science A",
volume="8",
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pages="916~920",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A0916"
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%A CRABTREE Vincent P.
%A ZHENG Jia
%A AZORIN-PERIS Vincent
%A ECHIADIS Angelos
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%DOI 10.1631/jzus.2007.A0916

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A1 - XIN Shang-zhi
A1 - HU Sijung
A1 - CRABTREE Vincent P.
A1 - ZHENG Jia
A1 - AZORIN-PERIS Vincent
A1 - ECHIADIS Angelos
A1 - SMITH Peter R.
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2007.A0916


Abstract: 
Objective: To study the regulation of blood pulse volume via photoplethysmography (PPG) signal detected from toe, while the lower limb is passively raised in different height positions. Methods: Use a modified non-invasive PPG technique to detect the blood pulse signal on toe with infrared (IR) photo sensor. A protocol consisting of two postures, i.e., supine and 45° reclining, was designed to conduct laboratory trial in this study. During the period of performing the protocol of these postures, the lower limb was passively raised from the heights of 10 cm to 60 cm randomly and individually with sponge blocks underneath the foot. Results: In the supine posture, the higher the foot was passively raised, the more the blood PPG signal decreased. In the 45° reclining posture, the blood PPG signal increased at the beginning and then decreased in the foot height position from 10 cm to 60 cm. In both postures the normalized AC signal changes significantly while the normalized DC signal changes little. Conclusion: The toe PPG signals can obviously indicate the regulated blood volume change with the designated postural procedures due to the heart level position.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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