A passively suspended tesla pump left ventricular assist device

Valentin Izraelev, William J. Weiss, Bryan Fritz, Raymond K. Newswanger, Eric G. Paterson, Alan Snyder, Richard B. Medvitz, Joshua Cysyk, Walter E. Pae, Dennis Hicks, Branka Lukic, Gerson Rosenberg

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The design and initial test results of a new passively suspended Tesla type left ventricular assist device blood pump are described. Computational fluid dynamics (CFD) analysis was used in the design of the pump. Overall size of the prototype device is 50 mm in diameter and 75 mm in length. The pump rotor has a density lower than that of blood and when spinning inside the stator in blood it creates a buoyant centering force that suspends the rotor in the radial direction. The axial magnetic force between the rotor and stator restrain the rotor in the axial direction. The pump is capable of pumping up to 10 L/min at a 70 mm Hg head rise at 8,000 revolutions per minute (RPM). The pump has demonstrated a normalized index of hemolysis level below 0.02 mg/dL for flows between 2 and 9.7 L/min. An inlet pressure sensor has also been incorporated into the inlet cannula wall and will be used for control purposes. One initial in vivo study showed an encouraging result. Further CFD modeling refinements are planned and endurance testing of the device.

Original languageEnglish (US)
Pages (from-to)556-561
Number of pages6
JournalASAIO Journal
Volume55
Issue number6
DOIs
StatePublished - Nov 1 2009

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Left ventricular assist devices
Heart-Assist Devices
Pumps
Hydrodynamics
Rotors
Blood
Equipment and Supplies
Stators
Hemolysis
Computational fluid dynamics
Head
Pressure
Pressure sensors
Dynamic analysis
Durability
Testing
Direction compound

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

Cite this

Izraelev, Valentin ; Weiss, William J. ; Fritz, Bryan ; Newswanger, Raymond K. ; Paterson, Eric G. ; Snyder, Alan ; Medvitz, Richard B. ; Cysyk, Joshua ; Pae, Walter E. ; Hicks, Dennis ; Lukic, Branka ; Rosenberg, Gerson. / A passively suspended tesla pump left ventricular assist device. In: ASAIO Journal. 2009 ; Vol. 55, No. 6. pp. 556-561.
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Izraelev, V, Weiss, WJ, Fritz, B, Newswanger, RK, Paterson, EG, Snyder, A, Medvitz, RB, Cysyk, J, Pae, WE, Hicks, D, Lukic, B & Rosenberg, G 2009, 'A passively suspended tesla pump left ventricular assist device', ASAIO Journal, vol. 55, no. 6, pp. 556-561. https://doi.org/10.1097/MAT.0b013e3181bae73e

A passively suspended tesla pump left ventricular assist device. / Izraelev, Valentin; Weiss, William J.; Fritz, Bryan; Newswanger, Raymond K.; Paterson, Eric G.; Snyder, Alan; Medvitz, Richard B.; Cysyk, Joshua; Pae, Walter E.; Hicks, Dennis; Lukic, Branka; Rosenberg, Gerson.

In: ASAIO Journal, Vol. 55, No. 6, 01.11.2009, p. 556-561.

Research output: Contribution to journalArticle

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Izraelev V, Weiss WJ, Fritz B, Newswanger RK, Paterson EG, Snyder A et al. A passively suspended tesla pump left ventricular assist device. ASAIO Journal. 2009 Nov 1;55(6):556-561. https://doi.org/10.1097/MAT.0b013e3181bae73e