Critical Role of Oxalate Restriction in Association with Calcium Restriction to Decrease the Probability of Being a Stone Former: Insufficient Effect in Idiopathic Hypercalciuria

Bataille, Pierre; Pruna, A; Grégoire, I.; Charransol, G.; Jf, de Fremont; Coevoet, B; Galy, C.; Fournier, A

doi:10.1007/978-1-4684-7272-1_95

Cited by 5 publications

(4 citation statements)

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“…Normocalciuria was defined as a urinary calcium excretion below 280 mg/day on free-choice diet, below 250 mg/day on lowcalcium diet for 2 days, which amounted to a maximum daily con sumption of 400 mg calcium [7,8], or a calcium/creatinine ratio of 4 hourly urine after starving for 12 h revealing less than 0.15. Hypercalciuria was defined as a urinary calcium excretion above 280 mg/day on free-choice diet or above 250 mg/day on low-calcium diet under the same conditions as described above.…”

Section: Materials and Methods Resultsmentioning

confidence: 99%

“…The comparisons of patients with idiopathic hypercalciuria and dietary hypercalciuria show that the decrease of the PSF is significantly greater in the former group of patients than in the latter group of subjects under the regular-calcium diet (table I). How ever, the combined restriction of dietary calcium and oxalate was not sufficient in idiopathic hypercalciuric patients to decrease their PSF conversely to normocal ciuric patients or subjects with dietary hypercalciuria [8]. The chief urinary risk factors leading to exaggerated supersaturation of urine with respect to calcium is some what complex, since various kinetics-modifying factors such as urine volume, oxalate, calcium, pH, alcian blueprecipitable polyanions, uric acid, promotors, creatinine or magnesium must be taken into acccount [17,18].…”

Section: 11]mentioning

confidence: 99%

“…The rise in urinary oxalate has been observed in patients with idiopathic hypercalciuria [4], many of However, recent investigators emphasized that oxal uria increased in subjects consuming low-calcium diet [6]. Bataille et al [7,8] also put forth the view that a combined calcium-and oxalate-restrictive diet de creased the probability of being a stone former only in normocalciuric and dietary hypercalciuric patients, but failed to reduce the probability of stone formation in indiopathic hypercalciuria because of an increase in uri nary oxalate excretion. We did a metabolic study mainly of urinary oxalate excretion, urinary calcium excretion and the probability of there being stones in idiopathic stone formers who were exposed to diets with different calcium contents.…”

Section: Introductionmentioning

confidence: 99%

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Effect of High-Calcium Diet on Urinary Oxalate Excretion in Urinary Stone Formers

Nakada¹,

Sasagawa²,

Furuta³

et al. 1988

Eur Urol

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Section: Materials and Methods Resultsmentioning

confidence: 99%

Section: 11]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of High-Calcium Diet on Urinary Oxalate Excretion in Urinary Stone Formers

Nakada¹,

Sasagawa²,

Furuta³

et al. 1988

Eur Urol

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“…5 Many workers observed that tea is the greatest dietary source of oxalate followed by spinach and rhubarb. Knowing that some foods with high oxalate content may induce peaks in oxalate excretion, 6 we have conducted a study to investigate the role of tea consumption on urinary oxalate excretion. …”

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confidence: 99%

Tea Consumption as a Possible Risk Factor in Urolithiasis: A Preliminary Report

et al. 1988

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The relationship between tea consumption and increased risk of urolithiaisis was studied in seven volunteers, four men and three women. All subjects were put on a tea-free diet for one week and different concentrates of tea for three weeks. Repeated biochemical analyses of known risk factors were performed on blood and urine. Urinary output increased significantly on the tea-rich diet, while calcium and uric acid excretion did not increase in all subjects. Urinary oxalate excretion showed a significant increase with increasing intake of tea in two subjects. The results of this limited trial suggest that increased ingestion of tea may cause hyperoxaluria and hence may increase the risk of urolithiasis. The incidence of urolithiaisis has been rising in affluent societies.1 Dietary intake of some foods and fluids may result in the increased urinary excretion of substances which are either stone constituents or promoters of stone formation. Epidemiologic studies show that the most prevalent stone component is calcium oxalate and that there is a direct correlation between stone disease and increased consumption of calcium, sugar, and animal protein.1 These dietary constituents increase the urinary excretion of calcium, oxalate, and uric acid, three of the most important risk factors for the crystallization and aggregation of calcium oxalate in urine. 2 Much attention has been paid to the role of calcium, but a number of investigators now consider oxalate concentration to be the most critical factor in urine for determining the risk of formation of calcium oxalate stones. 3Although dietary oxalate is responsible for only 10% to 15% of total urinary oxalate, 4 ingestion of oxalate-rich food causes a marked increase in urinary oxalate excretion. 5 Many workers observed that tea is the greatest dietary source of oxalate followed by spinach and rhubarb. Knowing that some foods with high oxalate content may induce peaks in oxalate excretion, 6 we have conducted a study to investigate the role of tea consumption on urinary oxalate excretion. Subjects and MethodsSeven healthy adults (four men and three women) were selected for the study. Their ages ranged between 26 and 46 years. The study lasted for four weeks. For one week the volunteers were given a tea-free diet, and for the remaining three weeks they consumed 2 liters of tea using one, two, or four bags daily. The four-week regime of tea consumption and tea-free diet were allocated on a randomized basis for each subject. For example, one subject

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Fluid intake recommendations in urolithiasis and general advice to patients without metabolic risk factors

Kiremit

Böyük²,

Petkova

2023

World J Urol

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Critical Role of Oxalate Restriction in Association with Calcium Restriction to Decrease the Probability of Being a Stone Former: Insufficient Effect in Idiopathic Hypercalciuria

Cited by 5 publications

References 4 publications

Effect of High-Calcium Diet on Urinary Oxalate Excretion in Urinary Stone Formers

Effect of High-Calcium Diet on Urinary Oxalate Excretion in Urinary Stone Formers

Tea Consumption as a Possible Risk Factor in Urolithiasis: A Preliminary Report

Fluid intake recommendations in urolithiasis and general advice to patients without metabolic risk factors

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