[Bladder wall permeability to to topically administered cisplatin]

The aim of the study was quantitation of cisplatinum in the wall of normal urinary bladder, tumor tissue, inflamed mucosa and blood in intravesical administration of cisplatinum. The samples of the tissue were radiated in the flow of heat neutrons 5 x 10(12)-5 x 10(13) neut/cm followed by radiochemical purification of the material and platinum assay in the tissue using analyser LP-4900 with semiconductor radiation detector. The samples were taken from 32 patients with transitional cancer of the bladder. Tumor tissue contained platinum in amounts 33.7 times exceeding those in normal tissue after intravesical administration of 100 mg of the drug. After intravenous administration of 100 mg cisplatinum normal bladder tissue and tumor tissue contained almost similar quantities of the drug. Thus, tumor tissue absorbs more cisplatinum than normal tissue of the bladder in intravesical administration.