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Effect of postural changes on lower limb blood volume, detected with non-invasive photoplethysmography
journal contribution
posted on 2016-08-05, 09:31 authored by Jia Zheng, Sijung HuSijung Hu, Shang-Zhi Xin, Vincent P. CrabtreeThis paper describes the effect of passive leg raising on blood volume change in the lower limb, using a dual probe photoplethysmography (PPG) system employing a tissue optics model. The normalized AC/DC ratio and DC value are introduced from the model to evaluate the dynamic pulsation and total blood volume changes due to postural effects. The AC and DC components of PPG signals were collected from a passive leg raising protocol. With the leg raised, the normalized AC/DC ratio significantly decreased when supine, while the normalized DC value increased significantly in both supine and reclining positions. The parameters from the stationary leg showed similar but smaller responses. These results demonstrate a local and systemic physiological phenomenon in the lower limb blood volume change caused by postural changes. The normalized AC/DC ratio and DC value derived from the tissue optics model could be applied to assess the blood volume change.
Funding
[The] authors would like to acknowledge Loughborough University for the financial support [and] the University of Shanghai for Science and Technology (USST) for sponsoring an academic visitor to participate in the experiments.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Journal of Medical Engineering & TechnologyVolume
32Issue
(5)Pages
. 358 - 364Citation
ZHENG, J. ... et al., 2008. Effect of postural changes on lower limb blood volume, detected with non-invasive photoplethysmography. Journal of Medical Engineering and Technology, 32 (5), pp.358-364.Publisher
© Informa UKVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2008Notes
Closed access.ISSN
0309-1902eISSN
1464-522XPublisher version
Language
- en