Determination of oxalate excretion in spot urines of healthy children by ion chromatography.
Eur J Clin Chem Clin Biochem
; 32(1): 27-9, 1994 Jan.
Article
en En
| MEDLINE
| ID: mdl-8167190
ABSTRACT
Evidence for the suitability of spot urines for selective screening in children was obtained by comparing the 24-hour urinary oxalate excretion with the ratio of urinary oxalate to creatinine [mmol/mol] in spontaneously voided urine samples. Spot urines of 169 healthy children aged 1 day to 13 years were analysed in order to establish reference values for the urinary oxalate/creatinine ratio in relation to age and body surface area. Oxalate was measured by automated ion chromatography. Results showed an inverse relationship between the oxalate/creatinine ratio and age. The highest ratios, 131 +/- 57 mmol/mol (mean +/- 2 SD), were found in infants. At age two years, the ratio was 84 +/- 55, at age five years 56 +/- 35, and for children older than ten years 42 +/- 31. This finding can be explained by the gain of muscle mass and hence increased creatinine production with increasing age. Data for the urinary oxalate/creatinine ratio are presented according to body surface area for the assessment of children with abnormal growth. In 19 urine samples from nine patients with primary hyperoxaluria, the oxalate/creatinine ratio greatly exceeded (286-2022 mmol/mol) the above reference ranges. We therefore propose the determination of the oxalate/creatinine ratio in spot urines for the selective screening for hyperoxaluria in children with nephrocalcinosis or urolithiasis.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Oxalatos
/
Creatinina
Tipo de estudio:
Diagnostic_studies
Límite:
Adolescent
/
Child
/
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
/
Newborn
Idioma:
En
Revista:
Eur J Clin Chem Clin Biochem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA CLINICA
Año:
1994
Tipo del documento:
Article
País de afiliación:
Alemania