Blood plasma fluoride in haemodialysed patients
1986
Abstract Blood plasma fluoride was determined in 15 chronic haemodialysed patients (60.2 ± 7.2 yr old) before and after a 4-h dialysis using dialysates with very low fluoride level, and in two control groups, the first of 20 healthy younger subjects (45.9 ± 3.4 yr old), the second of 8 healthy older subjects (69.1 ± 6.8 y old). Before haemodialysis the fluoride concentration (1.31 ± 0.31 μmol/l; 24.8 ± 5.9 μg/l), was higher than in both control groups (0.35 ± 0.16 μmol/l; 6.6 ± 3.1 μg/l and 0.44 ± 0.16 μmol/l 8.4 ± 3.0 μg/l, respectively). During dialysis, the mean fluoride concentration fell to 0.94 ± 0.26 μmol/l, remaining however, significantly higher than in control subjects. The use of fluoride-free dialysates seems to partially compensate the effect of renal impairment since plasma fluoride is only moderately increased in these patients.
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