The Meaning of the Turning Point of the Index of Motor Current Amplitude Curve in Controlling a Continuous Flow Pump or Evaluation of Left Ventricular Function

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Structured PICO

Population

Mock circulation loop and left ventricular assist device (LVAD)-equipped pigs

Intervention

Detection of the t-point of the index of motor current amplitude (ICA) curve and measuring or estimating the pump flow at the t-point

Comparator

Simultaneous cardiac output measurement

Outcome

Correlation between pump flow at the t-point and simultaneous cardiac outputsurrogate

Detection of the t-point of the ICA curve may allow for sensorless assessment of cardiac output in LVAD-supported conditions.

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May enable sensorless CO monitoring in LVAD patients; hypothesis-generating from animal data, needs human validation.

Endo et al. (2003) studied this question.

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