An algorithm for removing the effect of premature beats on monitoring the degree of vascular access occlusion based on PPG waveform morphology

Wen-Lu Han; Chang-Hong Fu; Li Zhang

doi:10.1117/12.3022898

28 March 2024 An algorithm for removing the effect of premature beats on monitoring the degree of vascular access occlusion based on PPG waveform morphology

Wen-Lu Han, Chang-Hong Fu, Li Zhang

Author Affiliations +

Proceedings Volume 13091, Fifteenth International Conference on Signal Processing Systems (ICSPS 2023); 130910P (2024) https://doi.org/10.1117/12.3022898
Event: Fifteenth International Conference on Signal Processing Systems (ICSPS 2023), 2023, Xi’an, China

Abstract

In the process of monitoring the degree of vascular access occlusion in the patient with a surgically created arteriovenous fistula, premature beats can affect the calculation accuracy of a critical indicator - the bilateral pulse peak arrival time difference (bilateral difference) variations derived from the photoplethysmographic (PPG) signals of the bilateral thumbs. To address this calculation error issue caused by premature beats, we propose an algorithm based on PPG waveform morphology to remove the influence of premature beats. This algorithm establishes PPG waveform templates for three types of heartbeats and utilizes template matching during the PPG signal peak detection analysis to remove pulse peak points corresponding to premature beats before computing the bilateral difference values. The experimental results show that removal of premature beats can greatly reduce the computational error in the variation of the true bilateral difference, and thus can improve the accuracy of monitoring the degree of vascular occlusion. The proposed algorithm exhibits a sensitivity of 97.6% and a false positive rate of 2.03%. Moreover, it requires minimal prior thresholds and offers a straightforward and efficient computation process, making it easily adaptable to various embedded system platforms.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Wen-Lu Han, Chang-Hong Fu, and Li Zhang "An algorithm for removing the effect of premature beats on monitoring the degree of vascular access occlusion based on PPG waveform morphology", Proc. SPIE 13091, Fifteenth International Conference on Signal Processing Systems (ICSPS 2023), 130910P (28 March 2024); https://doi.org/10.1117/12.3022898

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KEYWORDS

Pulse signals

Signal detection

Detection and tracking algorithms

Electrocardiography

Blood

Signal analyzers

Signal processing

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