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Related Experiment Video

Updated: Jan 23, 2026

Particle Image Velocimetry Investigation of Hemodynamics via Aortic Phantom
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Hemodynamic consequences of a multilayer flow modulator in aortic dissection.

Lambros S Athanasiou1,2, Farhad Rikhtegar Nezami3, Elazer R Edelman3,4

  • 1Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA. lambros@mit.edu.

Medical & Biological Engineering & Computing
|June 19, 2019
PubMed
Summary

The multilayer flow modulator (MFM) device effectively manages type-B aortic dissections by restoring blood flow perfusion and reducing false lumen dimensions. It prioritizes vital organ perfusion over solely restoring lumen morphology for improved homeostasis.

Keywords:
Aortic dissectionBlood flowMultilayer flow modulatorRecirculationWall shear stress

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Area of Science:

  • Cardiovascular Surgery
  • Medical Devices
  • Biomedical Engineering

Background:

  • Aortic dissections, particularly type-B, present complex therapeutic challenges.
  • Optimal timing for surgical, endovascular, or medical interventions remains unclear.
  • Current management often focuses on lumen morphology rather than hemodynamic principles.

Purpose of the Study:

  • To evaluate the efficacy of the multilayer flow modulator (MFM) device in type-B aortic dissections.
  • To assess the MFM's impact on hemodynamics, false lumen dimensions, and organ perfusion.
  • To compare MFM's effects with single-layer devices and traditional approaches.

Main Methods:

  • Utilized CT scans for pre- and post-MFM implantation imaging over 24 months.
  • Created 3D reconstructions to virtually place MFM devices (multilayer or single-layer).
  • Analyzed changes in flow perfusion, false lumen size, flow recirculation, and wall shear stress.

Main Results:

  • MFM device successfully restored flow perfusion and reduced false lumen dimensions.
  • MFM eliminated local flow recirculation and globally reduced wall shear stress.
  • Single-layer devices showed limitations, causing local disturbances.
  • MFM restored flow to vital organ vessels, independent of lumen patency.

Conclusions:

  • Aortic dissection management should prioritize blood flow modulation and vital organ perfusion.
  • The MFM device offers a promising approach by addressing hemodynamic factors.
  • Restoring homeostasis through flow modulation is more critical than solely altering lumen geometry.