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A Controller for a Miniature Intra‐Aortic Ventricular Assist Device
Author(s) -
Hsu PoLin,
Bruch Julius,
McMahon Richard
Publication year - 2011
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2010.01060.x
Subject(s) - afterload , impeller , ventricle , ventricular assist device , circulatory system , descending aorta , heart failure , aortic pressure , cardiology , medicine , aorta , perfusion , hemodynamics , biomedical engineering , engineering , mechanical engineering
Abstract Two control algorithms have been developed for a minimally invasive axial‐flow ventricular assist device (VAD) for placement in the descending aorta. The purpose of the device is to offload the left ventricle and to augment lower body perfusion in patients with moderate congestive heart failure. The VAD consists of an intra‐aortic impeller with a built‐in permanent magnet rotor and an extra‐aortic stator. The control algorithms, which use pressure readings upstream and downstream of the VAD to determine the pump status, have been tested in a mock circulatory system under two conditions, namely with or without afterload sensitivity. The results give an insight into controller design for an intra‐aortic blood pump working in series with the heart.