Characterisation of physico-mechanical properties and degradation potential of calcium alginate beads for use in embolisation

Forster, R.E.J., Thurmer, F., Wallrapp, C., LLOYD, ANDREW, MACFARLANE, WENDY, Phillips, G.J., Boutrand, J.-P. and Lewis, A.L. (2010) Characterisation of physico-mechanical properties and degradation potential of calcium alginate beads for use in embolisation Journal of Materials Science: Materials in Medicine, 21 (7). pp. 2243-2251. ISSN 0957-4530

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Abstract

High molecular weight alginate beads with 59% mannuronic acid content or 68% guluronic acid were prepared using a droplet generator and crosslinked in calcium chloride. The alginate beads were compared to current embolisation microspheres for compressibility and monitored over 12 weeks for size and weight change at 37 degrees C in low volumes of ringers solutions. A sheep uterine model was used to analyse bead degradation and inflammatory response over 12 weeks. Both the in vitro and in vivo data show good delivery, with a compressibility similar to current embolic beads. In vitro, swelling was noted almost immediately and after 12 weeks the first signs of degradation were noted. No difference was noted in vivo. This study has shown that high molecular weight alginate gel beads were well tolerated by the body, but beads associated with induced thrombi were susceptible to inflammatory cell infiltration. The beads were shown to be easy to handle and were still observable after 3 months in vivo. The beads were robust enough to be delivered through a 2.7 Fr microcatheter. This study has demonstrated that high molecular weight, high purity alginate bead can be considered as semi-permanent embolisation beads, with the potential to bioresorb over time.

Item Type:Journal article
Additional Information:© The Author(s) 2010. This article is published with open access at Springerlink.com
Subjects:C000 Biological and Biomedical Sciences
DOI (a stable link to the resource):10.1007/s10856-010-4080-y
Faculties:Faculty of Science and Engineering > School of Pharmacy and Biomolecular Sciences > Biomedical Materials
Faculty of Science and Engineering
Faculty of Science and Engineering > School of Pharmacy and Biomolecular Sciences
ID Code:7384
Deposited By:Converis
Deposited On:17 Sep 2010 10:26
Last Modified:22 Jan 2014 15:06

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