Table 3. Plasma Concentrations of Ropivacaine and PPX
Plasma concentration at the end of a 48-h interscalene infusion (Cend) of 6 and 9 ml/h ropivacaine, 2 mg/ml (12 and 18 mg/h), given 6 h after an interscalene block with 30 ml ropivacaine, 7.5 mg/ml (225 mg).H-L = Hodges–Lehman; PPX = 2.6-pipecoloxylidide.