LVAD Impeller/Volute Design to Minimize Magnetic Bearing Touchdown and Power

概要

論文の詳細を見る
The reduction of hydraulic force on a rotary VAD impeller is paramount for conserving power and minimizing impeller touchdown in systems employing magnetic suspension techniques. The objective of this research was to record the static hydraulic force experienced by a centrifugal LVAD impeller in a mock circulation loop reproducing various levels of heart failure. A closed type impeller exhibited a lower axial hydraulic force than a semi-open type at non-pulsatile design flow conditions of5L/min at100mmHg. A single volute demonstrated the lowest radial hydraulic force at these conditions followed by the double volute and circular volute. These forces were then found to fluctuate in the pulsatile environment, between values determined by non-pulsatile force results. The experimentally measured results aid the selection of a suitable impeller/volute configuration to minimize both impeller touchdown and power requirements of magnetic bearing systems in a pulsatile system.
ライフサポート学会の論文
2006-12-30