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An aortic--left ventricular pulse duplicator used in testing prosthetic aortic heart valves
The Journal of Thoracic and Cardiovascular Surgery
|April 1, 1977
Summary
A novel pulse duplicator accurately simulates human heart function for prosthetic valve testing. This device precisely mimics physiological pressure and flow, validating its use in cardiovascular research.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
Background:
- Prosthetic valve testing requires accurate simulation of physiological conditions.
- Existing models may not fully replicate complex pressure and flow dynamics.
Purpose of the Study:
- To develop and validate a pulse duplicator system for testing prosthetic heart valves.
- To accurately simulate left ventricular and ascending aorta pressure and flow waveforms.
Main Methods:
- A two-component model comprising a collapsible ventricle and an artificial systemic circulation.
- Utilized a lumped parameter model with series resistance, capacitance, and peripheral resistance.
- Adjustable parameters included heart rate, pressure, flow rates, and fluid viscosity.
Main Results:
- The pulse duplicator accurately reproduced physiological pressure and flow waveforms.
- Fourier analysis confirmed excellent quantitative agreement with physiological data.
- The Oxford aortic heart valve showed 1.9% regurgitation with no measurable pressure drop or power loss.
Conclusions:
- The developed pulse duplicator effectively simulates cardiovascular dynamics for prosthetic valve assessment.
- This system provides a reliable platform for evaluating valve performance, including regurgitation and hemodynamic parameters.