Fig. 5. Hematoxylin- and eosin-stained slide in rabbits after intrathecal ropivacaine: (A ) (500 × magnification) a posterior meningeal thickening can be seen in an animal receiving 1.0% ropivacaine (group R^1.0), and (B ) (125 × magnification) no specific lesion was observed after 2.0% ropivacaine.