Effects of an oxalate load on urinary oxalate excretion in calcium stone formers (2003)
- Autores:
- Autor USP: MARTINI, LIGIA ARAUJO - FSP
- Unidade: FSP
- DOI: 10.1053/jren.2003.50002
- Assuntos: ÁCIDOS ACÍCLICOS (URINA); CÁLCIO; DIETA; CÁLCULOS URINÁRIOS (METABOLISMO)
- Idioma: Inglês
- Resumo: Objective: To investigate the oxalate intake and the effect of an oxalate load on urinary oxalate excretion in calcium stone-forming (CSF) patients. Design: Prospective study. Setting: University-affiliated outpatient Renal Lithiasis Unit. Patients and controls: Seventy (70) CSF and 41 healthy subjects (HS) collected a 24-hour urine sample and were submitted to a 3-day dietary record to determine mean oxalate (Ox), calcium (Ca) and vitamin C intake. Fifty-eight (58) CSF patients were randomly selected to receive milk (N = 28) or dark (N = 30) chocolate as an oxalate load. Intervention: Administration of either milk (94 mg Ox + 430 mg Ca) or dark chocolate (94 mg Ox + 26 mg Ca) for 3 days. A 24-hour urine sample was obtained before and after the load to determine calcium, oxalate, sodium, potassium, urea, and creatinine. Main outcome measure: Oxalate intake and excretion. Results: CSF patients presented mean Ox intake of 98 ± 137 mg/d, similar to that of HS (108 ± 139 mg/d). Mean Ox and vitamin C intake was directly correlated with Ox excretion only in CSF. The consumption of dark chocolate induced a significant increase in mean urinary Ox (36 ± 14 versus 30 ± 10 mg/24 hr) not observed in the milk chocolate group. Thus, a 2-fold increase in Ox intake in this population of CSF patients produced a significant 20 percent increase in oxaluria, not observed when Ca was consumed simultaneously. Conclusion: The present study suggests that even small increases in Oxintake affect oxalate excretion and the mitigation of urinary oxalate increase by Ca consumption reinforces that Ca and Ox intakes for CSF patients should be in balance. Further studies are necessary to assess whether or not a 20 percent increase in oxaluria will lead to a higher risk of stone formation
- Imprenta:
- Local: Philadelphia
- Data de publicação: 2003
- Fonte:
- Título do periódico: Journal of Renal Nutrition
- ISSN: 1051-2276
- Volume/Número/Paginação/Ano: v. 13, n. 1, p. 39-46, 2003
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
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ABNT
MENDONÇA, Claúdia de O. G et al. Effects of an oxalate load on urinary oxalate excretion in calcium stone formers. Journal of Renal Nutrition, v. 13, n. 1, p. 39-46, 2003Tradução . . Disponível em: https://doi.org/10.1053/jren.2003.50002. Acesso em: 24 abr. 2024. -
APA
Mendonça, C. de O. G., Martini, L. A., Baxmann, A., Nishiura, J. L., Cuppari, L., Sigulem, D. M., & Heilberg, I. P. (2003). Effects of an oxalate load on urinary oxalate excretion in calcium stone formers. Journal of Renal Nutrition, 13( 1), 39-46. doi:10.1053/jren.2003.50002 -
NLM
Mendonça C de OG, Martini LA, Baxmann A, Nishiura JL, Cuppari L, Sigulem DM, Heilberg IP. Effects of an oxalate load on urinary oxalate excretion in calcium stone formers [Internet]. Journal of Renal Nutrition. 2003 ; 13( 1): 39-46.[citado 2024 abr. 24 ] Available from: https://doi.org/10.1053/jren.2003.50002 -
Vancouver
Mendonça C de OG, Martini LA, Baxmann A, Nishiura JL, Cuppari L, Sigulem DM, Heilberg IP. Effects of an oxalate load on urinary oxalate excretion in calcium stone formers [Internet]. Journal of Renal Nutrition. 2003 ; 13( 1): 39-46.[citado 2024 abr. 24 ] Available from: https://doi.org/10.1053/jren.2003.50002 - Cálcio
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Informações sobre o DOI: 10.1053/jren.2003.50002 (Fonte: oaDOI API)
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