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Related Experiment Video

Updated: Aug 29, 2025

Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves
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Trileaflet semilunar valve reconstruction: pulsatile in vitro evaluation.

Lisa Carlson Hanse1,2, Marcell J Tjørnild1,2, Simon G Sørensen2,3

  • 1Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Aarhus, Denmark.

Interactive Cardiovascular and Thoracic Surgery
|September 6, 2022
PubMed
Summary

A novel trileaflet semilunar valve reconstruction shows promise for treating right ventricular outflow tract malformations in children. This innovative technique offers a potential solution for growing patients, maintaining function and allowing for growth.

Keywords:
In vitroCongenitalNeo-valvePulmonary valve reconstructionTSVR

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Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Pediatric Cardiology

Background:

  • Residual regurgitation is a common complication after congenital surgery for right ventricular outflow tract malformation.
  • Current valve solutions are limited in growing children, necessitating innovative approaches.

Purpose of the Study:

  • To evaluate the feasibility of a new trileaflet semilunar valve reconstruction technique as a functional pulmonary valve replacement in vitro.
  • To assess the potential of this reconstruction for growth in pediatric patients.

Main Methods:

  • Porcine pulmonary trunks were utilized in a pulsatile flow-loop model.
  • Native leaflets were explanted, and trileaflet semilunar valve reconstruction was performed.
  • Hydrodynamic pressure and echocardiographic measurements were conducted at 4 L/min and 7 L/min flow rates.

Main Results:

  • All reconstructed valves demonstrated competence on color Doppler, with no significant pressure gradient differences.
  • Increased coaptation length was observed in the neo-valves at both flow rates.
  • A characteristic "windmill shape" was noted in all reconstructed valves.

Conclusions:

  • Trileaflet semilunar valve reconstruction is a sufficient and non-stenotic procedure.
  • The observed "windmill shape" may decrease with patient growth, maintaining valve sufficiency as a transitional solution.
  • Further in vivo investigations are recommended to validate this technique for clinical application.