Open AccessA Passively Suspended Tesla Pump Left Ventricular Assist Device
Author(s) -
Valentin Izraelev,
W. Jason Weiss,
Bryan Fritz,
Raymond K. Newswanger,
Eric G. Paterson,
Alan J. Snyder,
Richard B. Medvitz,
Joshua Cysyk,
Walter E. Pae,
Dennis L. Hicks,
Branka Lukic,
Gerson Rosenberg
Publication year - 2009
Publication title -
asaio journal
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.961
H-Index - 66
eISSN - 1538-943X
pISSN - 1058-2916
DOI - 10.1097/mat.0b013e3181bae73e
Subject(s) - rotor (electric) , cannula , computational fluid dynamics , stator , inlet , ventricular assist device , mechanics , materials science , impeller , head (geology) , biomedical engineering , physics , mechanical engineering , engineering , cardiology , surgery , medicine , geology , heart failure , geomorphology
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.