Miniaturization of a Magnetically Levitated Axial Flow Blood Pump


  • Presented in part at the 17th Congress of the International Society for Rotary Blood Pumps, held October 1–3, 2009, in Singapore.

Dr. Steven W. Day, Rochester Institute of Technology, Department of Mechanical Engineering, 76 Lomb Memorial Drive, Rochester, NY, 14623, USA. E-mail:


This article introduces a unique miniaturization process of a magnetically levitated axial flow blood pump from a functional prototype to a pump suitable for animal trials. Through COMSOL three-dimensional finite element analysis and experimental verification, the hybrid magnetic bearings of the pump have been miniaturized, the axial spacing between magnetic components has been reduced, and excess material in mechanical components of the pump was reduced. Experimental results show that the pump performance was virtually unchanged and the smaller size resulted in the successful acute pump implantation in calves.