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Basic concepts for active implantable valve development

 
: Biehl, M.; Scholz, O.

:

Dössel, O. ; International Union for Physical and Engineering Sciences in Medicine -IUPESM-:
World Congress on Medical Physics and Biomedical Engineering 2009. Vol.8: Micro- and nanosystems in medicine, active implants, biosensors : 7 - 12 September, 2009, Munich, Germany; WC 2009; 11th international congress of the IUPESM
Berlin: Springer, 2009 (IFMBE proceedings 25/8)
ISBN: 978-3-642-03886-0
ISBN: 978-3-642-03887-7
S.57-60
World Congress on Medical Physics and Biomedical Engineering <2009, München>
International Union for Physical and Engineering Sciences in Medicine (International Congress) <11, 2009, München>
Englisch
Konferenzbeitrag
Fraunhofer IBMT ()

Abstract
Based on fundamental considerations concerning implantable valve actuating mechanisms and a review of recent low-energy actuators, we propose four concepts to adjust or switch an implantable valve. The Bellow-Concept makes use of a standard actuator and hermetic encapsulation with flexible bellows, where force can be transmitted by deflection of the bellows. The Shape-Memory-Alloy-Concept considers a biocompatible Shape-Memory-Alloy (SMA) actuator, which can be directly immersed in body liquids. The Stepper-Motor-Concept makes use of a hermetically encapsulated rotatory actuator, with the rotatory action being transmitted magnetically through the rigid encapsulation wall. Finally, the Magnetic-Spring-Concept proposes a hermetically encapsulated linear actuator and linear magnetic force transmission through the rigid encapsulation wall. We found the Magnetic-Spring-Concept the smallest and most simple one.

: http://publica.fraunhofer.de/dokumente/N-145806.html