Table 2. Mean (± SD) Concentrations (ng/g) of Bupivacaine and Its Metabolites in the Maternal and Fetal Liver and Placenta at Various Sampling Times
ND = not detected; 3-OH Bup = 3′hydroxybupivacaine; 4-OH Bup = 4′hydroxybupivacaine; PPX-HCl = 2,6-pipecolylxylidine hydrochloride; T = trace amount.