IEEE Transactions on Biomedical Engineering

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Dual-Modality Volume Measurement Integrated on a Ventricular Assist Device
We present an approach to robustly measure heart volumes in patients with advanced heart disease for individualized therapy after the implantation of a heart pump. Therefore, we integrate ultrasound and impedance measurement techniques on a heart pump. In this in-vitro study, we found that the dual-modality approach was as accurate as standard calibrated measurements. In contrast to established methods, the dual-modality volume measurements are valid over a wide range of heart sizes without further calibration. By combining modalities, calibration becomes obsolete, and measurement of heart volume is possible despite changes in geometry that often occur after heart pump implantation... Read more