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Artif Organs. 1999 Mar;23(3):290-1.

Proposal of a new electromechanical total artificial heart: the TAH Serpentina.

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Klinik für Allgemein-, Visceral- und Transplantationschirurgie, Charité-Campus Virchow-Klinikum Medizinische Fakultät der Humboldt-Universität zu Berlin, Germany.


A new type of energy converter for an electro-mechanical total artificial heart (TAH) based on the principle of a unidirectional moving motor is described. Named the TAH Serpentina, the concept consists of 2 major parts, a pendulum shaped movable element fixed on one side using a joint bearing and a special shaped drum cam. Pusher plates are mounted flexibly to the crossbar of the pendulum. A motor drives the special shaped drum cam linked to the pendulum through a ball bearing. The circular motion of the unidirectional moving brushless DC motor is transferred into the linear motion of the pendulum to drive the pusher plates. Using a crossbar with a variable length, the stroke of the pendulum and therefore the displaced blood volume is alterable. To achieve a variable length, an electric driven screw thread or a hydraulic system is possible. Comparable to the natural heart, cardiac output would be determined by frequency and stroke volume.

[Indexed for MEDLINE]

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