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November 18, 2020Open Access

Experimental analysis of a Multilayer Flow Modulator deployment in an AAA with incorporated branch

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Why the study?

To experimentally evaluate the effect of Multilayer Flow Modulator device deployment in an abdominal aortic aneurysm model with and without an incorporated branch.

Does the Multilayer Flow Modulator (MFM) device reduce intra-aneurysmal flow velocity and vorticity while preserving incorporated branch flow in an experimental AAA model?

Population

Abdominal aortic aneurysm models with and without incorporated branch

Comparison

Models with vs without Multilayer Flow Modulator device

Design

Experimental in vitro study

Key result

The Multilayer Flow Modulator reduced average intra-aneurysmal flow velocity by 74.9-87.0% and enstrophy by 96.3-97.5% in in vitro AAA models while preserving incorporated branch perfusion.

Authors

STSimon TupinKTKei TakaseMOMakoto Ohta

Discussion

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Overview

Hypothesis-generating for MFM in AAA; prospective human trials needed before clinical consideration.

Structured PICO

Does the Multilayer Flow Modulator (MFM) device reduce intra-aneurysmal flow velocity and vorticity while preserving incorporated branch flow in an experimental AAA model?

P
Population
Experimental silicone box models of an Abdominal Aortic Aneurysm (AAA) with and without an incorporated branch (Inferior Mesenteric Artery).
I
Intervention
Deployment of a Multilayer Flow Modulator (MFM) device (uncovered stent made of cobalt alloy braided wires, Ø25 × 150 mm).
C
Comparator
Control (untreated) AAA silicone models.
O
Outcome
Pressure and flow rate evolution during and after deployment, and flow patterns (velocity and vorticity) evaluated by Particle Image Velocimetry (PIV).surrogate

The MFM device effectively reduces intra-aneurysmal flow velocity and vorticity while maintaining incorporated branch perfusion and pressure, providing an experimental basis for its potential to reduce type II endoleaks in AAA treatment.

Limitations

  • Idealized geometry
  • Steady-state flow conditions instead of pulsatile flow
  • Steady-state flow conditions

Cite This Study

Tupin et al. (2020) studied Abdominal Aortic Aneurysm (AAA). Multilayer Flow Modulator (MFM) vs. Untreated control model was evaluated on Intra-aneurysmal mean flow velocity and enstrophy. The Multilayer Flow Modulator reduced average intra-aneurysmal flow velocity by 74.9-87.0% and enstrophy by 96.3-97.5% in in vitro AAA models while preserving incorporated branch perfusion.

synapsesocial.com/papers/6a0d06c9f8c14364690cf0f9https://doi.org/10.48550/arxiv.2011.09431
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