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Preoperative Ozaki technique measures on tridimensional engineered root.

Sergio Pirola1, Giorgio Mastroiacovo2, Giulia Mostardini3

  • 1Department of Cardiovascular Surgery, Centro Cardiologico Monzino, IRCCS, Milan, Italy.

Journal of Cardiovascular Computed Tomography
|October 6, 2021
PubMed
Summary
This summary is machine-generated.

Three-dimensional aortic root models (ARMs) accurately predict aortic valve neocuspidalization (AVNeo) cusp sizes. This 3D modeling may help reduce aortic clamping time (ACT) during this innovative valve reconstruction surgery.

Keywords:
3D printingAVNeoOzaki procedurePreoperative planning

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Area of Science:

  • Cardiovascular Surgery
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Aortic valve neocuspidalization (AVNeo) reconstructs the aortic valve using autologous pericardium.
  • A key challenge in AVNeo is the extended aortic clamping time (ACT) due to neocusp sizing.

Purpose of the Study:

  • To evaluate the accuracy of 3D aortic root models (ARMs) in predicting in-vivo neocusp measurements for AVNeo.
  • To determine if 3D-ARMs can help reduce ACT during AVNeo procedures.

Main Methods:

  • Retrospective analysis of 30 patients undergoing AVNeo.
  • Creation of patient-specific 3D ARMs from CT-scan data.
  • Comparison of in-vitro measurements from 3D-ARMs with in-vivo intraoperative measurements.

Main Results:

  • Measurements from 3D-ARMs closely correlated with in-vivo measurements (r > 0.9, p < 0.0001).
  • Differences between in-vitro and in-vivo measurements were within an acceptable 2mm error limit in all cases.
  • Analysis based on annulus perimeter showed 89.9% perfect coincidence, with a 10.1% acceptable discrepancy.

Conclusions:

  • 3D-ARMs derived from CT-scans provide a reproducible method for sizing neocusps in AVNeo.
  • This 3D modeling approach shows potential for reducing aortic clamping time (ACT) in AVNeo surgery.