Kinetics of plasma platinum in a hemodialysis patient receiving repeated doses of cisplatin.

The pharmacokinetics of cisplatin were studied in a 46-year-old hemodialysis patient treated for uterine cancer with weekly cisplatin. Hemodialysis was performed immediately before, one-hour after, and two-hours after cisplatin administration for two consecutive cycles each. The concentrations of total and free platinum were measured. The decay curve of both total platinum and free platinum showed a biphasic pattern characterized by an alpha-phase and a beta-phase, the same as in non-hemodialysis patients. There were no differences between the individual cycles in the peak platinum concentration or the decay pattern. The plasma platinum concentration decreased to below detection limit 3 months after the final dose.