Magnetically suspended centrifugal blood pump with a self bearing motor

Toru Masuzawa, Hiroyuki Onuma, Seung-Jong Kim, Yohji Okada

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A magnetically suspended centrifugal blood pump with a self bearing motor has been developed for long-term ventricular assistance. A rotor of the self bearing motor is actively suspended and rotated by an electromagnetic field without mechanical bearings. Radial position of the rotor is controlled actively, and axial position of the rotor is passively stable within the thin rotor structure. An open impeller and a semiopened impeller were examined to determine the best impeller structure. The outer diameter and height of the impeller are 63 and 34 mm, respectively. Both the impellers indicated similar pump performance. Single volute and double volute structures were also tested to confirm the performance of the double volute. Power consumption for levitation and radial displacement of the impeller with a rotational speed of 1,500 rpm were 0.7 W and 0.04 mm in the double volute, while those in the single volute were 1.3 W and 0.07 mm, respectively. The stator of the self bearing motor was redesigned to avoid magnetic saturation and improve motor performance. Maximum flow rate and pressure head were 9 L/min and 250 mm Hg, respectively. The developed magnetically suspended centrifugal blood pump is a candidate for an implantable left ventricular assist device.

Original languageEnglish
Pages (from-to)437-442
Number of pages6
JournalASAIO Journal
Volume48
Issue number4
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

Fingerprint

Bearings (structural)
Blood
Rotors
Pumps
Electromagnetic Fields
Heart-Assist Devices
Left ventricular assist devices
Pressure
Impellers
Saturation magnetization
Electromagnetic fields
Stators
Electric power utilization
Flow rate

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

Cite this

Magnetically suspended centrifugal blood pump with a self bearing motor. / Masuzawa, Toru; Onuma, Hiroyuki; Kim, Seung-Jong; Okada, Yohji.

In: ASAIO Journal, Vol. 48, No. 4, 01.01.2002, p. 437-442.

Research output: Contribution to journalArticle

Masuzawa, Toru ; Onuma, Hiroyuki ; Kim, Seung-Jong ; Okada, Yohji. / Magnetically suspended centrifugal blood pump with a self bearing motor. In: ASAIO Journal. 2002 ; Vol. 48, No. 4. pp. 437-442.
@article{3c62b485bcee4259b4bf39127c432dd9,
title = "Magnetically suspended centrifugal blood pump with a self bearing motor",
abstract = "A magnetically suspended centrifugal blood pump with a self bearing motor has been developed for long-term ventricular assistance. A rotor of the self bearing motor is actively suspended and rotated by an electromagnetic field without mechanical bearings. Radial position of the rotor is controlled actively, and axial position of the rotor is passively stable within the thin rotor structure. An open impeller and a semiopened impeller were examined to determine the best impeller structure. The outer diameter and height of the impeller are 63 and 34 mm, respectively. Both the impellers indicated similar pump performance. Single volute and double volute structures were also tested to confirm the performance of the double volute. Power consumption for levitation and radial displacement of the impeller with a rotational speed of 1,500 rpm were 0.7 W and 0.04 mm in the double volute, while those in the single volute were 1.3 W and 0.07 mm, respectively. The stator of the self bearing motor was redesigned to avoid magnetic saturation and improve motor performance. Maximum flow rate and pressure head were 9 L/min and 250 mm Hg, respectively. The developed magnetically suspended centrifugal blood pump is a candidate for an implantable left ventricular assist device.",
author = "Toru Masuzawa and Hiroyuki Onuma and Seung-Jong Kim and Yohji Okada",
year = "2002",
month = "1",
day = "1",
doi = "10.1097/00002480-200207000-00019",
language = "English",
volume = "48",
pages = "437--442",
journal = "ASAIO Journal",
issn = "1058-2916",
publisher = "Lippincott Williams and Wilkins",
number = "4",

}

TY - JOUR

T1 - Magnetically suspended centrifugal blood pump with a self bearing motor

AU - Masuzawa, Toru

AU - Onuma, Hiroyuki

AU - Kim, Seung-Jong

AU - Okada, Yohji

PY - 2002/1/1

Y1 - 2002/1/1

N2 - A magnetically suspended centrifugal blood pump with a self bearing motor has been developed for long-term ventricular assistance. A rotor of the self bearing motor is actively suspended and rotated by an electromagnetic field without mechanical bearings. Radial position of the rotor is controlled actively, and axial position of the rotor is passively stable within the thin rotor structure. An open impeller and a semiopened impeller were examined to determine the best impeller structure. The outer diameter and height of the impeller are 63 and 34 mm, respectively. Both the impellers indicated similar pump performance. Single volute and double volute structures were also tested to confirm the performance of the double volute. Power consumption for levitation and radial displacement of the impeller with a rotational speed of 1,500 rpm were 0.7 W and 0.04 mm in the double volute, while those in the single volute were 1.3 W and 0.07 mm, respectively. The stator of the self bearing motor was redesigned to avoid magnetic saturation and improve motor performance. Maximum flow rate and pressure head were 9 L/min and 250 mm Hg, respectively. The developed magnetically suspended centrifugal blood pump is a candidate for an implantable left ventricular assist device.

AB - A magnetically suspended centrifugal blood pump with a self bearing motor has been developed for long-term ventricular assistance. A rotor of the self bearing motor is actively suspended and rotated by an electromagnetic field without mechanical bearings. Radial position of the rotor is controlled actively, and axial position of the rotor is passively stable within the thin rotor structure. An open impeller and a semiopened impeller were examined to determine the best impeller structure. The outer diameter and height of the impeller are 63 and 34 mm, respectively. Both the impellers indicated similar pump performance. Single volute and double volute structures were also tested to confirm the performance of the double volute. Power consumption for levitation and radial displacement of the impeller with a rotational speed of 1,500 rpm were 0.7 W and 0.04 mm in the double volute, while those in the single volute were 1.3 W and 0.07 mm, respectively. The stator of the self bearing motor was redesigned to avoid magnetic saturation and improve motor performance. Maximum flow rate and pressure head were 9 L/min and 250 mm Hg, respectively. The developed magnetically suspended centrifugal blood pump is a candidate for an implantable left ventricular assist device.

UR - http://www.scopus.com/inward/record.url?scp=0036631267&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036631267&partnerID=8YFLogxK

U2 - 10.1097/00002480-200207000-00019

DO - 10.1097/00002480-200207000-00019

M3 - Article

VL - 48

SP - 437

EP - 442

JO - ASAIO Journal

JF - ASAIO Journal

SN - 1058-2916

IS - 4

ER -