Bleomycin serum pharmacokinetics as determined by a radioimmunoassay and a microbiologic assay in a patient with compromised renal function

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Abstract
Serum and plasma bleomycin concentrations were determined in a patient with renal dysfunction at two creatinine clearances. The results obtained with a new radioimmunoassay and the microbiologic assay were compared. It was shown: 1) that the clearance of bleomycin from the blood is markedly retarded in severe renal dysfunction, 2) that clearance of bleomycin varies with creatinine clearance, 3) that bleomycin is probably not dialyzable, 4) that determinations on serum and plasma were equivalent, and 5) that the radioimmunoassay and microbiologic assays gave equivalent results (P < 0.001).