A drive mechanism for a blood pump integrated in an oxygenator

Amin Aghababaei 1 , Ali Kashefi 2  and Martin Hexamer 1
  • 1 Medical Engineering, Faculty of Electrical Engineering and Information Technology, Ruhr-University Bochum, 44780, Bochum, Germany
  • 2 Institute for Physiologe, Universitätsklinikum Aachen, Pauwelssstraße 30, 52074, Aachen, Germany


The achievement of a low priming volume of the components in an extracorporeal perfusion system for neonatal and pediatric patients is an open research question. This paper presents a concept of a pump-oxygenator in which an oxygenator and a pulsatile blood pump are combined in one housing. For operation of the pump-oxygenator, a special actuating system for the pump process was designed. It consists of a piston pump which is directly coupled with a voice coil actuator (VCA). A servo positioning system was developed to assure the piston motion according to predefined reference trajectories. First experimental results indicate the feasibility of driving this blood pump with a VCA. In an in-vitro study, the pump produced mean flow rates of 60-900 mL/min with stroke frequencies in the range of 60-240 beats per minute.

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Current Directions in Biomedical Engineering is an open access journal and closely related to the journal Biomedical Engineering - Biomedizinische Technik. CDBME is a forum for the exchange of knowledge in the fields of biomedical engineering, medical information technology and biotechnology/bioengineering for medicine and addresses engineers, natural scientists, and clinicians working in research, industry, or clinical practice.