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Omnicarbon 21 mm aortic valve prosthesis: in vitro hydrodynamic and echo-Doppler study
K Dumont1, R Segers, S Vandenberghe
1IBiTech, Institute of Biomedical Technology, Ghent University, Gent, Belgium. kris.dumont@rug.ac.be
The International Journal of Artificial Organs
|September 26, 2002
Summary
This study evaluated the Omnicarbon 21 mm cardiac valve using hydrodynamic and Doppler echocardiography. Results show effective performance with minimal regurgitation, suggesting suitability for aortic valve replacement.
Area of Science:
- Cardiovascular Engineering
- Biomedical Device Testing
- Hemodynamics
Background:
- Aortic valve disease necessitates reliable prosthetic devices.
- Accurate assessment of cardiac valve hemodynamics is crucial for patient outcomes.
- The Omnicarbon valve requires comprehensive performance evaluation.
Purpose of the Study:
- To assess the hemodynamic performance of the Omnicarbon 21 mm cardiac valve in the aortic position.
- To simultaneously evaluate valve performance and leakage using combined hydrodynamic and Doppler echocardiography.
- To investigate the influence of valve orientation on hemodynamic parameters.
Main Methods:
- Utilized a Pulse Duplicator System for in vitro testing.
- Conducted combined hydrodynamic and Doppler echocardiographic measurements.
- Assessed pressure gradients, effective orifice area, performance index, and regurgitation volumes.
Main Results:
- Mean pressure gradients ranged from 4.5-20.2 mmHg (hydrodynamic) and 2.0-170 mmHg (Doppler).
- Effective Orifice Area was 1.31 cm², with a performance index of 0.74 (geometric) or 0.38 (annulus).
- Regurgitation volumes were consistently below 3 ml, with a trend towards orientation effects on hemodynamics.
Conclusions:
- The Omnicarbon 21 mm cardiac valve demonstrates favorable hemodynamic performance in vitro.
- Low regurgitation volumes indicate effective valve sealing.
- Further investigation into valve orientation effects is warranted for optimal clinical application.