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Apical aortic blood pump preclinical assessment for long‐term use: Durability test and stator topology to reduce wear in the bearing system
Author(s) -
Silva Bruno Utiyama,
Fonseca Jeison Willian Gomes,
Leal Edir Branzoni,
Cardoso José Roberto,
Biscegli José Francisco,
Andrade Aron José Pazin
Publication year - 2020
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/aor.13587
Subject(s) - durability , stator , bearing (navigation) , topology (electrical circuits) , structural engineering , materials science , engineering , computer science , mechanical engineering , composite material , electrical engineering , artificial intelligence
Abstract This study presents an assessment for long‐term use of the apical aortic blood pump (AABP), focusing on wear reduction in the bearing system. AABP is a centrifugal left ventricle assist device initially developed for bridge to transplant application. To analyze AABP performance in long‐term applications, a durability test was performed. This test indicated that wear in the lower bearing pivot causes device failure in long‐term. A wear test in the bearing system was conducted to demonstrate the correlation of the load in the bearing system with wear. Results from the wear test showed a direct correlation between load and wear at the lower bearing pivot. In order to reduce load, thus reducing wear, a new stator topology has been proposed. In this topology, a radial stator would replace the axial stator previously used. Another durability test with the new stator has accounted twice the time without failure when compared with the original model.