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Ballonkyphoplastie pp 23–39Cite as

Biomechanik

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Schlussfolgerungen

Wichtig für ein besseres Verständnis des Injektionsvorganges bei der Vertebroplastik waren vor allem die Analyse der Bedeutung des Injektionsdruckes und der Zementviskosität für den Ausgang der Behandlung.

Die Betrachtung des theoretischen Modells des Injektionsdruckes lieferte ein erstaunliches Ergebnis. Ca. 95% des gesamten Injektionsdruckes wird dafür benötigt, die Reibung zwischen der Kanülenwand und dem Zement zu überwinden (extravertebraler Druck), und nur 5% des gesamten Injektionsdruckes ist notwendig für die Ausbreitung des Zementes in der Spongiosa (intravertebraler Druck). Die nachfolgenden Experimente haben bestätigt, dass der intravertebrale Druck deutlich geringer ist, als der extravertebrale Druck.

Die Analyse des Extravasationsrisikos ergab, dass vor allem durch die Verwendung eines höher viskösen Zementes dieses Risiko deutlich gesenkt werden kann. Außerdem würde ein niedrigerer Injektionsdruck und damit ein niedrigerer intravertebraler Druck die gleichmäßige Ausbreitung des Zementes begünstigen.

Zur Verbesserung des Injektionsprozesses haben wir eine neue Kanüle entwickelt. Diese trägt auf Grund ihrer Geometrie deutlich zur Senkung des Injektionsdruckes bei. Dadurch können höher visköse Zemente besser eingespritzt werden und das Risiko einer unzureichenden Füllung des Wirbelkörpers mit Zement wird gesenkt. Bis die neue Kanüle jedoch endgültig im klinischen Betrieb eingesetzt werden kann, sind weitere Tests erforderlich.

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Authors and Affiliations

  1. Laboratoire de Biomécanique, Département de génie mécanique, Faculté de génie, Université de Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec, Kanada, J1K 2R1

    Prof. Dr.-Ing. G. Baroud

  2. Abteilung Jülich, Lehr- und Forschungsbereich Biomedizintechnik, Fachbereich Angewandte Naturwissenschaften und Technik, Fachhochschule Aachen, Ginsterweg 1, 52428, Jülich, Deutschland

    F. Schmidt

  3. Laboratoire de Biomécanique, Département de génie mécanique, Faculté de génie, Université de Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec, Kanada, J1K 2R1

    Prof. Dr.-Ing. G. Baroud

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  1. Prof. Dr.-Ing. G. Baroud
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Editor information

Editors and Affiliations

  1. Wirbelsäulenzentrum, 3. Orthopädische Abteilung, Orthopädisches Spital Speising, Wien, Österreich

    Stephan Becker  & Michael Ogon  & 

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© 2006 Springer-Verlag/Wien

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Baroud, G., Schmidt, F., Baroud, G. (2006). Biomechanik. In: Becker, S., Ogon, M. (eds) Ballonkyphoplastie. Springer, Vienna. https://doi.org/10.1007/3-211-32315-5_4

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  • DOI: https://doi.org/10.1007/3-211-32315-5_4

  • Publisher Name: Springer, Vienna

  • Print ISBN: 978-3-211-23592-8

  • Online ISBN: 978-3-211-32315-1

  • eBook Packages: Medicine (German Language)

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