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Comparison of four embolic materials for portal vein embolization: experimental study in pigs

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Abstract

Different embolic materials for portal vein embolization (PVE) were evaluated. Twenty pigs received left and median PVE. Hydrophilic phosphorylcholine, N-butyl cyanoacrylate, hydrophilic gel, and polyvinyl alcohol (PVA) particles measuring either 50–150 µm or 700–900 µm were used in five pigs each. Portography and portal vein pressure measurement were performed before, immediately after PVE, and before being euthanized at day 7. Tissue wedges from embolized, and non-embolized liver were obtained for pathology. After complete embolization, recanalization occurred at 7 days in one gel and one 700–900 PVA embolization. Post-PVE increase in portal pressure was found in all groups (p = 0.01). The area of the hepatic lobules in non-embolized liver was larger than in the embolized liver in all groups (p = 0.001). The ratios of the areas between non-embolized/embolized livers were 1.65, 2.19, 1.57, and 1.32 for gel, NBCA, 50–150 PVA and 700–900 PVA, respectively; the ratios of fibrosis between the embolized and non-embolized livers were 1.37, 3.01, 3.49, and 2.11 for gel, NBCA, 50–150 PVA and 700–900 PVA, respectively. Hepatic lobules in non-embolized liver were significantly larger with NBCA than in other groups (p = 0.01). Fibrosis in embolized liver was significantly higher for NBCA and 50–150 PVA (p = 0.002). The most severe changes in embolized and non-embolized liver were induced by 50–150 PVA and NCBA PVE.

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Authors and Affiliations

  1. Department of Interventional Radiology, Institut de Cancérologie Gustave Roussy, 39 Rue Camille Desmoulins, 94805, Villejuif, France

    Thierry de Baere

  2. Department of Radiology and Interventional Radiology, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland

    Alban Denys

  3. Department of Anatomie Pathologique, Hôpital Beaujon-Inserm U773, CRB3, Clichy, France

    Valerie Paradis

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  1. Thierry de Baere
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  2. Alban Denys
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  3. Valerie Paradis
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Correspondence to Thierry de Baere.

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de Baere, T., Denys, A. & Paradis, V. Comparison of four embolic materials for portal vein embolization: experimental study in pigs. Eur Radiol 19, 1435–1442 (2009). https://doi.org/10.1007/s00330-008-1277-2

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  • DOI: https://doi.org/10.1007/s00330-008-1277-2

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