VCR ventracor limited


  1. 423 Posts.
    Thoratec (Heartmate III) uses magnetic levitation compared to VentrAssist which uses hydrodynamic levitation. Magnetic levitation requires a contact bearing and has been shown not to allow a purging flow of blood which can provide a means for heat to be dissipated and prevent a long fluid residence time. Excessive pressure is needed to pass all fluid through a bearing gap - VCR by using a rotary blood pump with impeller suspended hydrodynamically by thrust forces generated on the edges of the impeller blades avoids this - Reynolds theory of lubrication
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