Mobilizable lead in patients with chronic renal failure

European Journal of Clinical Investigation
J KosterE Ritz

Abstract

Blood lead (Pb) and urinary Pb before and after i.v. infusion of 1 g of Na2Ca EDTA were determined (atomic absorption) in 46 control subjects and 91 patients with various stages of renal failure (median serum creatinine 2.5 mg dl-1). Under baseline conditions, patients with renal failure had higher blood Pb levels (112 ng ml-1, range 44-272 vs. 76; 36-187 in controls; P less than 0.001) and lower urinary Pb (16.2 nmol 24 h-1 1.73 m-2, 4.86-66.8 vs. 33; 11-91 in controls; P = 0.001). The increment in urinary Pb after EDTA infusion (mobilizable Pb) was higher (795 nmol 4 days-1 1.73 m-2, range 155-5611 vs. 307; 131-1587 in controls; P = 0.001). In 12 patients with renal failure (13%) mobilizable Pb was above the highest value in controls. Mobilizable urinary Pb correlated (r = 0.68) significantly (P = 0.001) with blood Pb, but only marginally with serum creatinine (r = 0.32; P less than 0.007). Mobilizable Pb was higher in patients with renal failure and a history of smoking or occupational Pb exposure and tended to be higher in patients with alcoholism. Ten of 91 patients had gout; increased mobilizable Pb was present in three of the 10. The data confirm relatively high prevalence of elevated body Pb burden in European patients ...Continue Reading

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