Fig. 2. Concentrations of methylprednisolone (mean ± SD) in pig cerebrospinal fluid dialysates after either intravenous (IV) or intrathecal (IT) administration. TIT-IT = thoracic intrathecal—IT delivery; LC-IT = lumbar intrathecal—IT delivery; TC-IV = thoracic intrathecal—IV delivery; LC-IV = lumbar intrathecal—IV delivery. All data were corrected for dialysis probe efficiency.