Development of the Nimbus/University of Pittsburgh innovative ventricular assist system

Background. Nimbus Inc, and the University of Pittsburgh’s McGowan Center for Artificial Organ Development have been collaborators on rotary blood pump technology initiatives since 1992. Currently, a major focus is an innovative ventricular assist system (IVAS) that features an implantable, electric...

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Bibliographic Details
Published in:	The Annals of thoracic surgery Vol. 68; no. 2; pp. 790 - 794
Main Authors:	Butler, Kenneth C, Dow, Jerry J, Litwak, Philip, Kormos, Robert L, Borovetz, Harvey S
Format:	Journal Article Conference Proceeding
Language:	English
Published:	New York, NY Elsevier Inc 01-08-1999 Elsevier Science
Subjects:	Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy Animals Biological and medical sciences Cattle Emergency and intensive cardiocirculatory care. Cardiogenic shock. Coronary intensive care Equipment Design Heart Failure - etiology Heart Failure - mortality Heart Failure - surgery Heart-Assist Devices Hospitals, University Humans Intensive care medicine Medical sciences Models, Cardiovascular Pennsylvania Pulsatile Flow Pennsylvania Human Intensive cardiocirculatory care Costs Description Health economy Cardiocirculatory support Development Heart ventricle Technique Public health
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Summary:	Background. Nimbus Inc, and the University of Pittsburgh’s McGowan Center for Artificial Organ Development have been collaborators on rotary blood pump technology initiatives since 1992. Currently, a major focus is an innovative ventricular assist system (IVAS) that features an implantable, electrically powered axial flow blood pump. In addition to the blood pump, a major development item is the electronic controller and the control algorithm for modulating pump speed in response to varying physical demand. Methods. Methods used in developing the IVAS include computational fluid dynamic modeling of the pump’s interior flow field, flow visualization of the flow field using laser-based imaging, computer simulation of blood pump-physiological interactions, vibroaccoustic monitoring, and an extensive in vivo test program. Results. Results to date, which are presented below, include successful in vivo tests of blood pumps with blood-immersed bearings, and feasibility demonstration of vibroacoustic monitoring in this application. Conclusions. This unique blend of industrial experience and technologies with the University-based Research and Development Center has greatly enhanced the progress made on this IVAS project.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0003-4975 1552-6259
DOI:	10.1016/S0003-4975(99)00582-2