Premium
Magnetic Suspension of the Rotor of a Ventricular Assist Device of Mixed Flow Type
Author(s) -
Horikawa Oswaldo,
De Andrade Aron José Pazin,
Da Silva Isaías,
Bock Eduardo Guy Perpetuo
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.1525-1594.2008.00551.x
Subject(s) - magnetic bearing , bearing (navigation) , limiting , ventricular assist device , rotor (electric) , engineering , mechanical engineering , computer science , medicine , cardiology , heart failure , artificial intelligence
This work presents results of preliminary studies concerning application of magnetic bearing in a ventricular assist device (VAD) being developed by Dante Pazzanese Institute of Cardiology—IDPC (São Paulo, Brazil). The VAD‐IDPC has a novel architecture that distinguishes from other known VADs. In this, the rotor has a conical geometry with spiral impellers, showing characteristics that are intermediate between a centrifugal VAD and an axial VAD. The effectiveness of this new type of blood pumping principle was showed by tests and by using it in heart surgery for external blood circulation. However, the developed VAD uses a combination of ball bearings and mechanical seals, limiting the life for some 10 h, making impossible its long‐term use or its use as an implantable VAD. As a part of development of an implantable VAD, this work aims at the replacement of ball bearings by a magnetic bearing. The most important magnetic bearing principles are studied and the magnetic bearing developed by Escola Politécnica of São Paulo University (EPUSP‐MB) is elected because of its very simple architecture. Besides presenting the principle of the EPUSP‐MB, this work presents one possible alternative for applying the EPUSP‐MB in the IDPC‐VAD.