European Urology

Stones

Effects of a ‘Common Sense Diet’ on Urinary Composition and Supersaturation in Patients with Idiopathic Calcium Urolithiasis

Hess B.b · Mauron H.a · Ackermann D.c · Jaeger P.a

Author affiliations

aPoliclinic and bDepartment of Internal Medicine, University Hospital, Bern, and cDepartment of Urology, Kantonsspital, St. Gallen, Switzerland

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Eur Urol 1999;36:136–143

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Article / Publication Details

First-Page Preview
Abstract of Stones

Published online: July 08, 1999
Issue release date: August 1999

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 4

ISSN: 0302-2838 (Print)
eISSN: 1873-7560 (Online)

For additional information: https://www.karger.com/EUR

Abstract

Objectives: To test whether dietary advice as the only treatment is able to reduce urinary supersaturation in patients with idiopathic calcium urolithiasis. Methods: By means of EQUIL 2, we calculated relative supersaturations of calcium oxalate (RSCaOx), brushite (RSBrushite), apatite (RSApatite) and uric acid (RSUA) of 24-hour urine samples of 68 healthy male controls as well as of 47 male idiopathic calcium stone formers (ICSF) before and after individualized dietary advice (DA). Main goals of DA were (1) to keep urine volume > 2,000 ml/day, and (2) to reduce meat protein intake to 1 g/kg body weight per day. Compliance was judged from changes in urine volume and UUrea×V. Results: In the whole group of ICSF, DA did not alter supersaturations. Only in those 9 ICSF (19%) with good compliance (increase in volume and decrease in UUrea×V), RSCaOx and RSUA fell by 26 and 49%, respectively. Besides poor compliance, these findings can be explained by positive correlations between changes in volume and UUrea×V in ICSF (r = 0.319, p = 0.037) or UNa×V (r = 0.342, p = 0.019). For instance, ICSF with volumes ≧ 2,000 ml/day had evidence of elevated protein and salt intake; thus, DA mainly focused on protein and salt intake, but not on volume. This resulted in decreases in UUrea×V and UNa×V, but also in volume; thus, RSCaOx remained unaltered. Conclusions: DA is able to significantly lower RSCaOx; however, because intakes of fluid and protein are directly and positively linked to each other, this only can be achieved if high fluid and lower meat protein intake are equally stressed in all ICSF.




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Article / Publication Details

First-Page Preview
Abstract of Stones

Published online: July 08, 1999
Issue release date: August 1999

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 4

ISSN: 0302-2838 (Print)
eISSN: 1873-7560 (Online)

For additional information: https://www.karger.com/EUR


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