Intra-luminal injection of ferro-fluid for magnetic bowel retraction in minimal access surgery

Zhigang G. Wang, Andrew W. Brown, Stuart Brown, Lijun Wang, Pascal Andre, Gordon J. Florence, Alfred Cuschieri

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Safe and effective manipulation of soft tissue during laparoscopic and other minimal access surgical (MAS) procedures can be enabled by use of electromagnetic force. We investigated magnet interaction force using finite element modeling (FEM) and tensiometer measurement, and found that our FEM results were in good agreement with measurement data. Then, we describe a novel method of ferro-magnetisation of a bowel segment for magnetic retraction. Simulated surgical procedures were carried out using an ex-vivo pig bowel model. Ferromagnetic microparticles were dispersed in a viscous carrier liquid, and injected intra-luminally to the inner (mucosal) aspect of the bowel wall. The injected magnetic microparticles were then retracted towards a magnetic probe which was located external to the bowel wall, and magnetic interaction force between the injected magnetic aggregation and the probe was found sufficient to manipulate the bowel segment. In this preliminary experiment, the probe was consisted of small Neodymium magnet discs, and magnetic attraction force can be changed by adding or reducing the number of magnet discs used. Magnetic fluids with different concentration were prepared and injected without difficulty. To solidify the magnetic aggregation, a medical grade cyanoacrylate liquid was injected sequentially and mixed in-situ with the injected microparticles aggregation underneath the magnet probe. The ferromagnetic coagulum appears to be a promising method for safe and effective magnetic bowel retraction in MAS.
    Original languageEnglish
    Title of host publicationMechatronics and Embedded Systems and Applications (MESA)
    PublisherIEEE
    Pages168-173
    Number of pages6
    ISBN (Print)9781424471010
    DOIs
    Publication statusPublished - 2010
    Event2010 IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications - QingDao Hai Tian Hotel, Qingdao, China
    Duration: 15 Jul 201017 Jul 2010
    http://www.asmemesa.org/ezconf/index.php?co_id=10

    Conference

    Conference2010 IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications
    Abbreviated titleMESA10
    CountryChina
    CityQingdao
    Period15/07/1017/07/10
    Internet address

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