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Published on: March 28, 2025
Modeling Outcomes: Modified Aortic Arch Advancement for Neonatal Hypoplastic Arch
Joseph R Nellis1, Timothy K Chung, Nandita Agarwal
1From the *University of Iowa Carver College of Medicine, Iowa City, IA USA; †University of Iowa College of Engineering, Iowa City, IA USA; ‡Department of Radiology, University of Iowa Hospital, Iowa City, IA USA; §Department of Cardiothoracic Surgery, Yavapai Regional Medical Center, Prescott, AZ USA; and ∥Department of Pediatric Cardiac Surgery, University of Iowa Children's Hospital, Iowa City, IA USA.
This study shows that using an anterior patch for neonatal hypoplastic aortic arch repair results in favorable early hemodynamic outcomes. Computational fluid dynamics modeling supports improved blood flow compared to other repair methods.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Biomedical Engineering
Background:
- Neonatal hypoplastic aortic arch repair involves various surgical techniques, broadly categorized by patch inclusion or exclusion.
- The choice of repair method is often based on surgeon experience due to limited outcome data.
Purpose of the Study:
- To evaluate early outcomes of neonatal aortic arch advancement using a modified anterior patch repair.
- To utilize computational fluid dynamics (CFD) to analyze hemodynamic differences between the anterior patch repair and direct end-to-side repairs.
Main Methods:
- Retrospective review of neonates who underwent anterior patch aortic arch advancement.
- Generation of 3D CFD models from cardiac MRI data for both anterior patch and end-to-side repairs.
- Simulation of cardiac waveform inputs and analysis of hemodynamic parameters.
Main Results:
- No significant hemodynamic gradients were observed in the 10 neonates at median follow-up.
- CFD models showed more concentric laminar flow in the anterior patch repair versus asymmetrical flow in end-to-side repairs.
- The anterior patch repair demonstrated significantly lower spatial velocity and wall shear stress variations distal to the anastomosis.
Conclusions:
- The modified anterior patch technique for neonatal hypoplastic aortic arch repair demonstrates favorable early hemodynamic results.
- CFD modeling provides valuable insights into the biomechanical advantages of the anterior patch repair over traditional methods.
