Left Ventricle Failure and Blood Flow Estimation for Centrifugal Blood Pumps
نویسندگان
چکیده
This paper shows the blood flow control (FwC) performance to adjust rotational speed of an ICBP (implantable centrifugal blood pump) in order to provide an adequate flow to left ventricle in different patient conditions. ICBP is a totally implantable LVAD (left ventricular assist device) with ceramic bearings developed for long term circulatory assistance. FwC uses PI (proportional-integral) control to adjust rotational speed in order to provide blood flow. FwC does not use sensor for feedback, as there is an estimation system to provide blood flow measurement. Control strategy has being studied in a HCS (hybrid cardiovascular simulator) as a tool that allows the physical connection of ICBP during evaluation. In addition, HCS allows changes of some cardiovascular parameters in order to simulate specific heart disease: ejection fraction (10-25%) and heart rate (50-110 bpm). FwC was able to adjust blood flow with steady error less than 2%. Results demonstrated that FwC is adequate to LVAD control in different left ventricle failure conditions.
منابع مشابه
Completely pulsatile high flow circulatory support with a constant-speed centrifugal blood pump: mechanisms and early clinical observations.
OBJECTIVE Various types of rotary blood pumps (axial flow, centrifugal) have been introduced into clinical use recently. These pumps have different pressure-flow characteristics, and some investigators have noted that a limited pump flow rate and less pulsatility are the problems with the axial flow devices. METHODS A new implantable centrifugal blood pump was developed that has an extremely ...
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