Artificial Heart Rejects High Tech? Lessens Learnt from Non-pulsatile VAD with Straight Impeller Vanes
نویسنده
چکیده
Despite the progresses in developing pulsatile impeller pump and impeller total heart, as well as in applying streamlined impeller vanes, the best results in application of artificial heart pumps have been achieved by nonpulsatile univentricular assist pump with straight impeller vanes until now. It seems all efforts and successes have been done in vain because artificial heart rejects Hi-Tech! This paper recalls some important achievements in R&D of artificial heart in past 25 years and shares author's experiences with the readers.
منابع مشابه
Computational modelling and evaluation of cardiovascular response under pulsatile impeller pump support.
This study presents a numerical simulation of cardiovascular response in the heart failure condition under the support of a Berlin Heart INCOR impeller pump-type ventricular assist device (VAD). The model is implemented using the CellML modelling language. To investigate the potential of using the Berlin Heart INCOR impeller pump to produce physiologically meaningful arterial pulse pressure wit...
متن کاملDesign and transient computational fluid dynamics study of a continuous axial flow ventricular assist device.
A ventricular assist device (VAD), which is a miniaturized axial flow pump from the point of view of mechanism, has been designed and studied in this report. It consists of an inducer, an impeller, and a diffuser. The main design objective of this VAD is to produce an axial pump with a streamlined, idealized, and nonobstructing blood flow path. The magnetic bearings are adapted so that the impe...
متن کاملSewage Pump Impeller Selection
Although the mathematics that define the operation of an impeller can be complex (it is the stuff of Bernoulli and Euler), its purpose is straight forward. An impeller is designed to impart energy to a fluid so that it will flow or, if it is already flowing, undergo some increase in its elevation or pressure. It accomplishes this by increasing the fluid’s velocity as it travels through its vane...
متن کاملNumerical Analysis of a Centrifugal Fan for Improved Performance using Splitter Vanes
The flow field in a centrifugal fan is highly complex with flow reversal taking place on the suction side of impeller and diffuser vanes. Generally performance of the centrifugal fan could be enhanced by judiciously introducing splitter vanes so as to improve the diffusion process. An extensive numerical whole field analysis on the effect of splitter vanes placed in discrete regions of suspecte...
متن کاملWorld Journal of Modelling and Simulation
It is quite well known that the diffusers are required for efficient conversion of the dynamic head generated by the impeller in a centrifugal fan. Hence the flow into the diffuser passage plays a crucial role in determining the efficiency of conversion. The flow in the region bounded by the impeller exit and the diffuser entry i.e. the radial clearance space is generally considered to be highl...
متن کامل