2010
DOI: 10.1111/j.1525-1594.2009.00870.x View full text |Buy / Rent full text
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Abstract: Recent studies into rotary biventricular support have indicated that inadequate left/right flow balancing may lead to vascular congestion and/or ventricular suckdown. The implementation of a passive controller that automatically adjusts left/right flow during total and partial cardiac support would improve physiological interaction. This has encouraged the development of a biventricular assist device (BiVAD) prototype that achieves passive control of the two rotary pumps' hydraulic output by way of a nonrotati… Show more

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“…Increasing the clearance between the impeller blades and pump casing has been shown to have an exponentially decaying rate of pressure head and flow decrease (19). Figure 3e,f, however, shows that there is very little effect upon the performance gradient.…”
Section: Resultsmentioning
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“…Increasing the clearance between the impeller blades and pump casing has been shown to have an exponentially decaying rate of pressure head and flow decrease (19). Figure 3e,f, however, shows that there is very little effect upon the performance gradient.…”
Section: Resultsmentioning
“…Nicholas Richard Gaddum et al. (27) of Queensland University of Technology, Brisbane, Australia investigated optimizing the response from passively controlled biventricular assist rotary pump outputs by way of a nonrotating double pressure plate configuration. An incorporated mechanical spring–mass–damper assembly affected the passive response to optimize the dynamic interaction between the prototype and the supported cardiovascular system.…”
Section: Cardiac Support and Blood Pumpsmentioning
“…A passive control system for rotary BiVADs has also been proposed, but this approach has several limitations including the algorithm being specific to a single device 17 and hypersensitivity to outlet/arterial pressure and afterload. 18,19 A passive control algorithm that was proposed prevented suction, but physiological responses have not been demonstrated with this algorithm. 20 An active control algorithm was proposed for BiVAD support that minimized suction events but did not prevent suction.…”
Section: Introductionmentioning