DEVELOPMENT OF VIBRATING FLOW PUMP FOR LEFT-VENTRICULAR ASSIST CIRCULATION

Vibrating flow pump (VFP) can generate high frequency oscillated blood flow within 10-40 Hz. In this study, new type VFP was developed as a ventricular assist device. Left Ventricular assist circulation using V FP were performed as aseptic animal experiments using goals. hemodynam ic parameters were recorded continuously at awaked state. Driving freq uency of VFP was 25 Hz and pump flow rate was controlled to approximat ely 2 l/min. Frequency of VFP was 25 hz and pump flow rate was control led to approximately 2 L/min. Frequency analysis method was used for a nalyzing hemodynamics. The peak of power was observed at 25 Hz from th e Fourier transformation of blood flow waveform. Systemic vascular res istance was decreased by the start of left ventricular assistance usin g oscillated blood flow. No fatal arrhythmia was observed during this study. As the conclusion, new type VFP has a sufficient performance fo r left Ventricular assistance. Small size blood pump may be enabled by the oscillated blood flow because VFP is driven at high frequency mov ing with short stroke volume.