[Pharmacokinetic comparison between cisplatin and nedaplatin in hepatic arterial chemotherapy using complete hepatic venous isolation and charcoal hemoperfusion].

We undertook a pharmacokinetic comparison between cisplatin and nedaplatin in hepatic arterial chemotherapy using complete hepatic venous isolation and charcoal hemoperfusion (HVI.CHP). Dogs received a 20-min hepatic arterial infusion of either 4 mg/kg cisplatin (Group I, n = 5) or 4 mg/kg nedaplatin (Group II, n = 5) under HVI.CHP. The CHP filter adsorption ratios did not differ significantly between the two groups. Drug clearance fractions by HVI.CHP in group II (free pt 45.9%, total pt 55.1%) were significantly higher than those in group I (free pt 23.4%, total pt 27.5%) (p < 0.05). In contrast, hepatic extraction ratios in group I tended to be higher than those in group II. These results indicated that extrahepatic distribution of cisplatin became lower than that of nedaplatin, when given via the hepatic artery, and that the pharmacokinetic advantage of HVI.CHP would be greater when a drug like nedaplatin with a relatively low hepatic extraction ratio is used. Thus, we concluded that nedaplatin is a more suitable drug than cisplatin.