Florence Franconi1,2, Olivier Lefranc3, Amandine Radlovic3, Laurent Lemaire4,5. 1. UNIV ANGERS, PRISM-Plateforme de Recherche en Imagerie et Spectroscopie Multimodales, 4 rue Larrey, 49933, Angers, France. 2. UNIV ANGERS, INSERM UMR-S 1066- CNRS 6021, Micro et Nanomédecines Translationnelles-MINT, 4 rue Larrey, 49933, Angers, France. 3. SOFRADIM Production, 116 avenue du Formans, 01600, Trevoux, France. 4. UNIV ANGERS, PRISM-Plateforme de Recherche en Imagerie et Spectroscopie Multimodales, 4 rue Larrey, 49933, Angers, France. laurent.lemaire@univ-angers.fr. 5. UNIV ANGERS, INSERM UMR-S 1066- CNRS 6021, Micro et Nanomédecines Translationnelles-MINT, 4 rue Larrey, 49933, Angers, France. laurent.lemaire@univ-angers.fr.
Abstract
PURPOSE: This study aims at evaluating the non-invasive Magnetic Resonance Imaging (MRI) technic to visualize a synthetic composite hernia mesh using a rodent model and to document the integration of this device over 4 months. METHODS: Uncoated polyethylene terephthalate mesh and synthetic composite mesh-faced on the visceral side with a chemically engineered layer of copolymer of glycolide, caprolactone, trimethylene carbonate, and lactide to minimize tissue attachment-were placed intraperitoneally in rats, facing the caecum previously scraped to promote petechial bleeding and subsequent adhesions. Meshes fate follow-up was performed 4, 10, and 16-weeks post-implantation using a rodent dedicated high field MRI. Magnetization transfer (MT) images were acquired, associated with pneumoperitonealMRI performed after intraperitoneal injection of 8 mL gas to induce mechanical stress on the abdominal wall. RESULTS: Uncoated meshes were clearly visible using both T2-weighted and MT imaging during the whole study while composite meshes conspicuity was not so evident on T2-weighted MRI and could be improved using MT imaging. Adhesions and collagen infiltration were massive for the uncoated meshes as expected. On the contrary, composite meshes showed very limited adhesion, and, if any, occurring at the edge of the mesh, starting at the fixation points. CONCLUSIONS: Magnetization transfer imaging allows to detect mesh integration and, associated with pneumoperitoneum, was able to probe the effective minimizing effect of the synthetic polymeric barrier on visceral attachments. However, magnetization transfer imaging could not unambiguously allow the visualization of the mesh through the polymeric barrier.
PURPOSE: This study aims at evaluating the non-invasive Magnetic Resonance Imaging (MRI) technic to visualize a synthetic composite hernia mesh using a rodent model and to document the integration of this device over 4 months. METHODS: Uncoated polyethylene terephthalate mesh and synthetic composite mesh-faced on the visceral side with a chemically engineered layer of copolymer of glycolide, caprolactone, trimethylene carbonate, and lactide to minimize tissue attachment-were placed intraperitoneally in rats, facing the caecum previously scraped to promote petechial bleeding and subsequent adhesions. Meshes fate follow-up was performed 4, 10, and 16-weeks post-implantation using a rodent dedicated high field MRI. Magnetization transfer (MT) images were acquired, associated with pneumoperitonealMRI performed after intraperitoneal injection of 8 mL gas to induce mechanical stress on the abdominal wall. RESULTS: Uncoated meshes were clearly visible using both T2-weighted and MT imaging during the whole study while composite meshes conspicuity was not so evident on T2-weighted MRI and could be improved using MT imaging. Adhesions and collagen infiltration were massive for the uncoated meshes as expected. On the contrary, composite meshes showed very limited adhesion, and, if any, occurring at the edge of the mesh, starting at the fixation points. CONCLUSIONS: Magnetization transfer imaging allows to detect mesh integration and, associated with pneumoperitoneum, was able to probe the effective minimizing effect of the synthetic polymeric barrier on visceral attachments. However, magnetization transfer imaging could not unambiguously allow the visualization of the mesh through the polymeric barrier.
Authors: A Lambertz; L C L van den Hil; A Ciritsis; R Eickhoff; N A Kraemer; N D Bouvy; A Müllen; U Klinge; U P Neumann; C D Klink Journal: J Invest Surg Date: 2017-06-08 Impact factor: 2.533
Authors: Alexander Ciritsis; Nienke Lynn Hansen; Alexandra Barabasch; Nicolas Kuehnert; Jens Otto; Joachim Conze; Uwe Klinge; Christiane K Kuhl; Nils Andreas Kraemer Journal: Invest Radiol Date: 2014-07 Impact factor: 6.016