ArticleThe journal of vascular access2026
Preliminary evaluation of a novel surface accelerometer (HAVSE) for dialysis access surveillance: An exploratory pilot study.
Article in The journal of vascular access, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundArteriovenous fistula (AVF) dysfunction commonly results from hemodynamically significant stenosis, which alters the local turbulence and generates characteristic vibrational signatures. A Hemodialysis Access Vibration and Sound Evaluation (HAVSE) device is a low-cost surface accelerometer designed to quantify these mechanical signals. This pilot study evaluated whether HAVSE could detect physiologically coherent changes in the AVF vibrational amplitude before and after angioplasty.
methodsWe prospectively enrolled adults with dysfunctional arteriovenous fistulas who were scheduled to undergo angioplasty. HAVSE recordings were obtained immediately before and after intervention at predefined anatomical locations. Vibrational amplitude was derived from cardiac-cycle-specific accelerometry and expressed as a dimensionless postoperative-to-preoperative ratio to minimize inter-patient variability. Stenoses were categorized as perianastomotic, outflow, or central. Paired Wilcoxon signed-rank tests and Hodges-Lehmann estimates were used to assess relative postoperative changes. The study was prospectively registered with the Australian New Zealand Clinical Trials Registry (ANZCTR) under the identifier ACTRN12619000281190.
resultsNineteen patients were included in this analysis. In isolated perianastomotic stenosis, postoperative vibrational amplitude consistently decreased (median ratio 0.55; 95% confidence interval, 0.20-0.86;
conclusionsSurface vibration analysis using HAVSE demonstrated physiologically coherent patterns in isolated perianastomotic and outflow stenoses but limited discriminatory performance in multifocal or central venous disease, supporting further device development and validation in larger studies that incorporate Doppler ultrasound correlations and standardized acquisition protocols.
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