title: Multiple-site hemodynamic analysis of Doppler ultrasound with an adaptive color relation classifier for arteriovenous access occlusion evaluation.
abstract: This study proposes multiple-site hemodynamic analysis of Doppler ultrasound with an adaptive color relation classifier for arteriovenous access occlusion evaluation in routine examinations. The hemodynamic analysis is used to express the properties of blood flow through a vital access or a tube, using dimensionless numbers. An acoustic measurement is carried out to detect the peak-systolic and peak-diastolic velocities of blood flow from the arterial anastomosis sites (A) to the venous anastomosis sites (V). The ratio of the supracritical Reynolds (Re(supra)) number and the resistive (Res) index quantitates the degrees of stenosis (DOS) at multiple measurement sites. Then, an adaptive color relation classifier is designed as a nonlinear estimate model to survey the occlusion level in monthly examinations. For 30 long-term follow-up patients, the experimental results show the proposed screening model efficiently evaluates access occlusion.
authors.affiliation: Department of Biomedical Engineering, National Cheng Kung University, Tainan City 70101, Taiwan.
authors.forename: Jian-Xing
authors.initials: JX
authors.lastname: Wu
authors.affiliation: Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, Taiwan.
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Du
authors.affiliation: Department of Internal Medicine, Kaohsiung Veterans General Hospital, Tainan Branch, Tainan City 71051, Taiwan.
authors.forename: Ming-Jui
authors.initials: MJ
authors.lastname: Wu
authors.affiliation: Division of Infectious Diseases, Department of Medicine of Chi Mei Medical Center, Tainan City 71004, Taiwan.
authors.forename: Chien-Ming
authors.initials: CM
authors.lastname: Li
authors.affiliation: Department of Electrical Engineering, Kao Yuan University, Kaohsiung City 82151, Taiwan.
authors.forename: Chia-Hung
authors.initials: CH
authors.lastname: Lin
authors.affiliation: Department of Biomedical Engineering, National Cheng Kung University, Tainan City 70101, Taiwan.
authors.forename: Tainsong
authors.initials: T
authors.lastname: Chen
mesh_terms: D001166:Arteriovenous Shunt, Surgical; D006439:Hemodynamics; D006801:Humans; D006435:Renal Dialysis; D018615:Ultrasonography, Doppler, Color