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Dynamic Mode Decomposition of Fontan Hemodynamics in an Idealized Total Cavopulmonary Connection

Yann T Delorme1, Anna-Elodie M Kerlo1, Kameswararao Anupindi1

  • 1School of Mechanical Engineering, Purdue University, Lafayette, IN, United States.

Fluid Dynamics Research
|September 2, 2014
PubMed

Insights

Univentricular heart disease treatment involves complex surgery creating a Total Cavopulmonary Connection (TCPC). Dynamic Mode Decomposition reveals flow instabilities in TCPC, aiding surgical improvement and device design.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Fluid Dynamics

Background:

  • Univentricular heart disease is a leading cause of infant mortality from birth defects.
  • Surgical repair often involves creating a Total Cavopulmonary Connection (TCPC) through multiple open-heart procedures.
  • TCPC results in passive pulmonary blood flow, leading to inefficient circulation and potential complications.

Purpose of the Study:

  • To analyze the fluid dynamics within an idealized Total Cavopulmonary Connection (TCPC).
  • To identify and characterize unsteady flow patterns and energy dissipation in the TCPC.
  • To assess the agreement between experimental data and computational simulations for TCPC flow.

Main Methods:

  • Utilized Dynamic Mode Decomposition (DMD) to analyze flow data.
  • Applied DMD to Stereoscopic Particle Imaging Velocimetry (SPIV) experimental data.
  • Applied DMD to Large Eddy Simulation (LES) computational fluid dynamics results.

Main Results:

  • DMD effectively highlighted unsteady vortical dynamics within the TCPC.
  • Identified significant energy dissipation and pressure loss due to confined impinging jets.
  • Demonstrated qualitative agreement between SPIV measurements and LES simulations.

Conclusions:

  • DMD is a valuable tool for understanding complex hemodynamics in TCPC.
  • The findings provide insights for improving TCPC surgical techniques.
  • Results support the use of LES and SPIV for designing mechanical cavopulmonary assist devices.

Keywords:
Dynamic Mode DecompositionFlow instabilitiesFontan circulation

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