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J Thorac Cardiovasc Surg 2003;125:43-44
© 2003 The American Association for Thoracic Surgery

Evolving Technology (ET)

Successful use of a miniaturized bypass system with the DeltaStream extracorporeal rotary blood pump

Stefan Christiansen, MDa, Christof Göbelb, Wolfgang Buhre, MDc, Helmut Reul, PhDb, Rüdiger Autschbach, MDa Aachen, Germany

From the Departments of Cardiothoracic Surgerya and Anesthesiologyc and the Helmholtz-Institute,b University of Aachen, Aachen, Germany.

Received for publication March 7, 2002. Accepted for publication May 21, 2002. Address for reprints: Stefan Christiansen, MD, Department of Cardiothoracic Surgery, University of Aachen, Pauwelsstr 30, 52074 Aachen, Germany (E-mail: schristiansen@ukaachen.de).

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   Introduction
 
Extracorporeal circulations used for many cardiac procedures might result in an impaired function of nearly all organs.Go 1 Beating-heart surgery without extracorporeal circulation is performed more and more to avoid these disadvantages. In this setting revascularization of the right or the circumflex coronary artery might be impossible as a result of severely impaired hemodynamics.Go 2 Simplified bypass systems are developed to overcome these problems.Go 3 We report on the first successful use of the DeltaStream extracorporeal rotary blood pump (ERBP; Medos AG, Stolberg, Germany) for myocardial revascularization.


   Device description
 
The DeltaStream ERBP is developed for versatile extracorporeal circulation. One potential application is intraoperative circulation with a simplified bypass system, which is reduced to its basic components, the pump and the oxygenator. The priming volume of this simplified bypass system is 800 mL (Figure 1).


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  		Fig. 1. The setting of a simplified bypass system consisting of tubes, an oxygenator, and the DeltaStream ERBP.

 
The pump has a length of 150 mm, a diameter of 40 mm, a volume of 30 mL, and a weight of 280 g. It has an embedded, long, cylindrical electromotor with an electromechanical efficiency of up to 90%. The motor is surrounded by an annular flow path providing sufficient motor cooling by the blood flow. The DeltaStream ERBP works with moving magnets and stationary coils attached to the housing, and . . . [Full Text of this Article]






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