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Arteriovenous Oscillometric Plethysmography for Fistula Functional Testing.
Veit Busch1,2, Joachim Streis1,3, Sandra Müller4
1Research Center for BioMedical Technology, University of Applied Sciences and Arts, Dortmund, Germany.
Kidney & Blood Pressure Research
|June 27, 2024
Summary
Oscillometric pulse wave analysis reveals distinct peripheral wave morphology differences between fistula and non-fistula arms in hemodialysis patients. These pulse wave alterations, influenced by arteriovenous flow, show potential for assessing arteriovenous fistula function.
Area of Science:
- Vascular Medicine
- Biomedical Engineering
- Nephrology
Background:
- Arteriovenous fistulas are crucial for hemodialysis access.
- Monitoring fistula function is essential to prevent complications.
- Peripheral pulse wave analysis offers a non-invasive method for assessment.
Purpose of the Study:
- To evaluate the impact of fistula flow on peripheral pulse wave morphology and velocity.
- To assess the utility of oscillometric pulse wave analysis for fistula surveillance.
- To compare pulse wave characteristics between fistula and non-fistula arms.
Main Methods:
- Prospective observational study involving 53 hemodialysis patients.
- Analysis of digitized and normalized pulse wave curves from fistula and non-fistula arms using the Vicorder® device.
- Computation of slope parameters, areas under the curve, power spectrum, and amplitude of volumetric change (AMP).
- Duplex sonography used as a reference method.
Main Results:
- Significant inter-arm differences in pulse wave morphology, including a delayed systolic maximum at the fistula arm (p < 0.001).
- No significant difference in pulse wave velocity between arms (p = 0.942).
- Inter-arm differences in slope parameters were more pronounced in forearm fistulas.
- Inter-arm difference of AMP correlated with fistula volume flow (r = 0.326, p = 0.017).
Conclusions:
- Oscillometric pulse wave analysis demonstrates distinct features in fistula arms due to enhanced arteriovenous flow.
- These pulse wave alterations hold potential for evaluating arteriovenous fistula function.
- Non-invasive pulse wave analysis can serve as a valuable tool for fistula surveillance.
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