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Comparative Study
English Abstract
Journal Article
[Melphalan pharmacokinetics during isolated limb regional perfusion in patients with skin melanoma and soft tissue sarcoma].
Voprosy Onkologii 2015
The study of pharmacokinetics of melphalan in the perfusate and blood plasma during isolated limb regional perfusion (ILRP) was carried out in patients with melanoma (n=21) and soft tissue sarcoma (n = 24). Melphalan was administered as 10 mg/l for a lower extremity and 13 mg/l for a upper extremity. Quantification of melphalan in perfusate and blood samples was performed by means of liquid chromatography/tandem mass spectrometry. 30 samples of the perfusate and 27 venous blood samples were analyzed. During the first 5 minutes of ILRP concentration of melphalan in the perfusate decreased to 13.2% of the initial value, and by the end of perfusion (60 minutes) it was 3.3%. The amount of melphalan in the blood plasma of the patients by the end of ILRP wasn't higher than 1.6% from the administered dose. That demonstrates minor systemic absorption of the drug during ILRP. Moreover melphalan concentration in the blood plasma during the perfusion was in average 0.015-0.223 mg/l which is significantly lower compared to the blood plasma concentrations after intravenous administration of melphalan. Thus ILRP procedure provided 97% of the melphalan dose accumulation in the soft tissues of a limb and in tumor tissues. Also pharmacokinetic advantage of melphalan over systemic administration of the drug was shown.
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