Evaluation of arteriovenous shunt stenosis in hemodialysis patients by using the burg method for autoregressive modeling

Wei Ling Chen, Chia Hung Lin, Chung-Dann Kan, Tainsong Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposed the signal processing method for evaluation of arteriovenous shunt (AVS) stenosis in hemodialysis patients. AV shunts are surgically created pathological-physiological fistulas serving as access routes for end-stage renal disease (ESRD) patients. The distinct and periodic bruit of vascular shunts is clearly audible over the access routes. Thus, a bruit spectral analysis could be considered a valuable noninvasive method for quantifying the severity of vessel stenosis. This study collected phonoangiographic data from thirty AV shunts obtained from the electronic stethoscope during the pre- and post-percutaneous transluminal angioplasty (PTA) periods. An autoregressive (AR) model was applied to scientifically analyze the phonoangiographic signals. The AR model and the filter order of eight were chosen to estimate the characteristic frequency of the bruit. The AR model results obtained from the analysis of the phonoangiographic data under the pre-PTA and post-PTA conditions show significant changes in frequency and magnitude. These findings could serve as a noninvasive strategy for early detection of stenotic lesions.

Original languageEnglish
Title of host publicationProceedings of 2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012
Pages560-564
Number of pages5
DOIs
Publication statusPublished - 2012 Oct 29
Event2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012 - Hokkaido, Japan
Duration: 2012 Aug 32012 Aug 5

Publication series

NameProceedings of 2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012
Volume2

Other

Other2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012
CountryJapan
CityHokkaido
Period12-08-0312-08-05

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Biomedical Engineering

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    Chen, W. L., Lin, C. H., Kan, C-D., & Chen, T. (2012). Evaluation of arteriovenous shunt stenosis in hemodialysis patients by using the burg method for autoregressive modeling. In Proceedings of 2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012 (pp. 560-564). [6291369] (Proceedings of 2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012; Vol. 2). https://doi.org/10.1109/ITiME.2012.6291369