Mean concentrations [Min-Max] Morphine 3.34 [0.05-23.9] mg/mL Ropivacaïne 7.54 [0.4-9.8] mg/mL Ziconotide 0.98 [0.04-5.8] μg/mL

Table 1: Mean concentrations of morphine, ropivacaïne and ziconotide in the PIT.