Key result
In an in vitro mock circuit, the index of motor current amplitude of a mixed flow pump could detect the turning point to total left heart assistance and the beginning of severe sucking.
The assist status of a continuous flow artificial heart can be estimated by detecting specific points (t- and s-points) derived from the index of motor current amplitude in LV and LALV bypass configurations.
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May inform sensorless LVAD monitoring; leaves open in vivo validation before any clinical use.
Araki et al. (1998) studied this question. Mixed flow pump (MFP) with different inlet alternatives (LA, LV, LALV) was evaluated on Index of motor current amplitude (ICA) peak point (t-point) and second specific point (s-point). In an in vitro mock circuit, the index of motor current amplitude of a mixed flow pump could detect the turning point to total left heart assistance and the beginning of severe sucking.
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