Right ventricular (RV) dysfunction has limited the effectiveness of mechanical circulatory support (MCS) therapy in some heart failure (HF) patients. Intravascular pumps can provide adequate circulatory support without the need for extensive operations. The development of an intravascular right ventricular assist device (RVAD), called the cavo-arterial pump (CAP), is presented. Two prototypes of the CAP were developed to demonstrate the feasibility of providing adequate pulmonary support and to demonstrate the feasibility of using axial magnetic couplings for contactless torque transmission from the motor shaft to the pump impeller. The CAP utilizing a direct drive mechanism produced a maximum pressure of 100 mm Hg and a maximum flow of 2.25 L/min when operated at 24 kRPM. When a magnetic drive mechanism was used, the overall flowrate decreased due to a loss in torque transmission. The magnetic drive CAP was able to operate up to 18.5 kRPM and produce a maximum flowrate of 1.35 L/min and a maximum pressure difference of 40 mm Hg. These results demonstrate that the CAP produces sufficient output for partial circulatory support of the pulmonary circulation, and that axial magnetic couplings can help to eliminate the sealing system needed to isolate the miniature motor and bearings from blood contact.
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March 2018
Research-Article
Preliminary Design and Testing of a Cavo-Arterial Pump Utilizing Axial Magnetic Couplings
John Valdovinos,
John Valdovinos
Department of Electrical and
Computer Engineering,
California State University Northridge,
18111 Nordhoff Street,
Northridge, CA 91330
e-mail: john.valdovinos@csun.edu
Computer Engineering,
California State University Northridge,
18111 Nordhoff Street,
Northridge, CA 91330
e-mail: john.valdovinos@csun.edu
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J. Chris Bouwmeester,
J. Chris Bouwmeester
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
170 College Street,
Toronto, ON M5S 3E3, Canada
e-mail: chris.bouwmeester@utoronto.ca
Biomedical Engineering,
University of Toronto,
170 College Street,
Toronto, ON M5S 3E3, Canada
e-mail: chris.bouwmeester@utoronto.ca
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Pramod Bonde
Pramod Bonde
Center for Advanced Heart
Failure and Transplantation,
Yale School of Medicine,
330 Cedar Street, 204 Boardman,
New Haven, CT 06520
e-mail: pramod.bonde@yale.edu
Failure and Transplantation,
Yale School of Medicine,
330 Cedar Street, 204 Boardman,
New Haven, CT 06520
e-mail: pramod.bonde@yale.edu
Search for other works by this author on:
John Valdovinos
Department of Electrical and
Computer Engineering,
California State University Northridge,
18111 Nordhoff Street,
Northridge, CA 91330
e-mail: john.valdovinos@csun.edu
Computer Engineering,
California State University Northridge,
18111 Nordhoff Street,
Northridge, CA 91330
e-mail: john.valdovinos@csun.edu
J. Chris Bouwmeester
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
170 College Street,
Toronto, ON M5S 3E3, Canada
e-mail: chris.bouwmeester@utoronto.ca
Biomedical Engineering,
University of Toronto,
170 College Street,
Toronto, ON M5S 3E3, Canada
e-mail: chris.bouwmeester@utoronto.ca
Pramod Bonde
Center for Advanced Heart
Failure and Transplantation,
Yale School of Medicine,
330 Cedar Street, 204 Boardman,
New Haven, CT 06520
e-mail: pramod.bonde@yale.edu
Failure and Transplantation,
Yale School of Medicine,
330 Cedar Street, 204 Boardman,
New Haven, CT 06520
e-mail: pramod.bonde@yale.edu
1Corresponding author.
Manuscript received May 18, 2017; final manuscript received October 5, 2017; published online November 9, 2017. Assoc. Editor: Michael Eggen.
J. Med. Devices. Mar 2018, 12(1): 011001 (7 pages)
Published Online: November 9, 2017
Article history
Received:
May 18, 2017
Revised:
October 5, 2017
Citation
Valdovinos, J., Chris Bouwmeester, J., and Bonde, P. (November 9, 2017). "Preliminary Design and Testing of a Cavo-Arterial Pump Utilizing Axial Magnetic Couplings." ASME. J. Med. Devices. March 2018; 12(1): 011001. https://doi.org/10.1115/1.4038221
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