Avaliação da taxa de filtração glomerular com EDTA-51 Cr em pacientes com anemia falciforme / 51Cr-EDTA measurements of the glomerular filtration rate in patients with sickle cell anemia

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Creatinine clearance has been reported to be inaccurate for the glomerular filtration rate (GFR) estimation in patients with sickle celI anemia (SCA). Inulin clearance, the reference method for GFR estimation, is impractical for routine use in these patients. 51Cr EDTA measurements of the GFR have been rarely reported in SCA. In order to obtain reference 51Cr-EDTA values in this disease, we studied 70 patients (40 females, 30 males; 13-59 years old, mean: 31.6 years) with homozygous SCA and normal serum creatinine. AlI patients were submitted to single-injection 51Cr-EDTA to analyze the GFR, urinary albumin and hematocrit measurements. 51Cr-EDTA clearances were calculated in different age groups (<20, 20-29, 30-39,40-49 and >50 years). The mean GFR (± standard deviation) obtained for the 70 patients was 111.5 ± 23.1 ml/min. Analysis ofvariance for evaluation ofthe possible interaction effect between 51CrEDT A clearance and sex, age, urinary albumin and hematocrit demonstrated patient age as the only factor influencing 51Cr-EDTA clearance (p<0.001). The Spearman correlation .coefficient showed a significant relationship between 51Cr-EDT A clearance and patient age (r=-0.44, p=0.0001), but not between 51Cr-EDTA and urinary albumin (r =-0.17, p=0.1546) orhematocrit (r =0.079, p=0.5121). The group aged 20-29 years presented the hi~hest 51CrEDTA clearance mean value (126.7 ± 20.4 ml/min), with a progressive reduction in the older groups. Young adults with homozygous SCA and normal serum creatinine present supranormal 51Cr- EDTA GFR values. These values rapidly decrease to normallevels with aging. We did not find association between albuminuria and GFR in these patients

ASSUNTO(S)

hemoglobinopatia hemoglobinopathy albuminuria albuminuria

ACESSO AO ARTIGO

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