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Comparative Study of Single Opening&Closing and Continuous Pulsatile Flow Valve Tester
Hao Wang1, Zhiqian Lu2, Zhongxi Zhou2,3
1School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu Province, 212013, P. R. China.
Cardiovascular Engineering and Technology
|August 19, 2024
Summary
The single opening & closing valve tester (SOCVT) shows no statistical difference in closing volume fraction compared to the continuous pulsatile flow valve tester (CPFVT). This suggests the SOCVT may be a viable alternative for mitral valve testing.
Area of Science:
- Biomedical Engineering
- Cardiovascular Device Testing
- Hemodynamics
Background:
- Accurate assessment of mitral valve function is crucial for patient outcomes.
- Existing valve testing methods have limitations in simulating physiological conditions.
- Standardization of in vitro testing is needed for reliable device evaluation.
Purpose of the Study:
- To compare the closing volume fraction measurements between a single opening & closing valve tester (SOCVT) and a continuous pulsatile flow valve tester (CPFVT).
- To evaluate the accuracy and potential discrepancies in mitral valve testing using these two apparatuses.
Main Methods:
- A comparative study was performed using four mitral valve conditions (normal, 40% dilation, 60% dilation, clipped repair).
- Hemodynamic conditions were selected based on ISO 5840 standards.
- Closing volume fractions were measured in both SOCVT and CPFVT, and errors were calculated for 16 cases.
Main Results:
- Continuous pulsatile flow valve tester (CPFVT) flowrate waveforms were more influenced by hemodynamic conditions than valve morphology.
- Twelve cases showed 10-20% error in closing volume fractions, while 3 cases had 2.2-5.5% error.
- No statistically significant difference was found in closing volume fraction between the CPFVT and SOCVT across all tested mitral valve conditions (P > 0.05).
Conclusions:
- Despite some measurement errors, the SOCVT and CPFVT yield comparable closing volume fraction results for mitral valves.
- Standardizing SOCVT testing using typical mitral valve flow waveforms could enhance its utility.
- The SOCVT presents a potential alternative for mitral valve testing, offering a simplified approach.
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