Premium
Performance Characterization of a Rotary Centrifugal Left Ventricular Assist Device With Magnetic Suspension
Author(s) -
Jahanmir Said,
Hunsberger Andrew Z.,
Heshmat Hooshang,
Tomaszewski Michael J.,
Walton James F.,
Weiss William J.,
Lukic Branka,
Pae William E.,
Zapanta Conrad M.,
Khalapyan Tigran Z.
Publication year - 2008
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.1525-1594.2008.00559.x
Subject(s) - suspension (topology) , electromagnetic suspension , ventricular assist device , characterization (materials science) , centrifugal force , mechanical engineering , materials science , mechanics , biomedical engineering , engineering , physics , cardiology , medicine , magnet , nanotechnology , mathematics , rotational speed , heart failure , homotopy , pure mathematics
The MiTiHeart (MiTiHeart Corporation, Gaithersburg, MD, USA) left ventricular assist device (LVAD), a third‐generation blood pump, is being developed for destination therapy for adult heart failure patients of small to medium frame that are not being served by present pulsatile devices. The pump design is based on a novel, patented, hybrid passive/active magnetic bearing system with backup hydrodynamic thrust bearing and exhibits low power loss, low vibration, and low hemolysis. Performance of the titanium alloy prototype was evaluated in a series of in vitro tests with blood analogue to map out the performance envelop of the pump. The LVAD prototype was implanted in a calf animal model, and the in vivo pump performance was evaluated. The animal's native heart imparted a strong pulsatility to the flow rate. These tests confirmed the efficacy of the MiTiHeart LVAD design and confirmed that the pulsatility does not adversely affect the pump performance.