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Application of a magnetic fluid seal to rotary blood pumps.

Authors
  • Mitamura, Y
  • Arioka, S
  • Sakota, D
  • Sekine, K
  • Azegami, M
Type
Published Article
Journal
Journal of physics. Condensed matter : an Institute of Physics journal
Publication Date
May 21, 2008
Volume
20
Issue
20
Pages
204145–204145
Identifiers
DOI: 10.1088/0953-8984/20/20/204145
PMID: 21694274
Source
Medline
License
Unknown

Abstract

A magnetic fluid seal enables mechanical contact-free rotation of a shaft without frictional heat and material wear and hence has excellent durability. However, the durability of a magnetic fluid seal decreases in liquid. The life of a seal applied to a rotary blood pump is not known. We have developed a magnetic fluid seal that has a shield mechanism minimizing the influence of the rotary pump on the magnetic fluid. The developed magnetic fluid seal worked for over 286 days in a continuous flow condition, for 24 days (on-going) in a pulsatile flow condition and for 24 h (electively terminated) in blood flow. The magnetic fluid seal is promising as a shaft seal for rotary blood pumps.

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