OBJECTIVE: To determine the effect of renal function on urinary mineral stone excretion and composition of kidney stones in patients undergoing urologic intervention for nephrolithiasis. METHODS: We performed a retrospective analysis of 158 patients with 193 kidney stones who underwent endourologic intervention for nephrolithiasis. The patients were grouped by the estimated glomerular filtration rate (eGFR). The kidney stone composition and results of the 24-hour urinalysis were reported for each group. Statistical analysis was performed using the chi-square test, Kruskal-Wallis test, and analysis of variance. RESULTS: The kidney stone composition profile differed significantly between the groups, with uric acid stones associated with a lower eGFR and calcium phosphate stones associated with a greater eGFR. A lower eGFR correlated with lower urine pH, lower calcium excretion, and greater oxalate excretion. Excretion of uric acid and the body mass index did not differ between groups. CONCLUSION: Different degrees of renal function correlated with certain types of kidney stones. The urine pH was lower in patients with impaired renal function. Renal function might be an underappreciated factor that affects kidney stone composition and urinary mineral excretion.
OBJECTIVE: To determine the effect of renal function on urinary mineral stone excretion and composition of kidney stones in patients undergoing urologic intervention for nephrolithiasis. METHODS: We performed a retrospective analysis of 158 patients with 193 kidney stones who underwent endourologic intervention for nephrolithiasis. The patients were grouped by the estimated glomerular filtration rate (eGFR). The kidney stone composition and results of the 24-hour urinalysis were reported for each group. Statistical analysis was performed using the chi-square test, Kruskal-Wallis test, and analysis of variance. RESULTS: The kidney stone composition profile differed significantly between the groups, with uric acid stones associated with a lower eGFR and calcium phosphate stones associated with a greater eGFR. A lower eGFR correlated with lower urine pH, lower calcium excretion, and greater oxalate excretion. Excretion of uric acid and the body mass index did not differ between groups. CONCLUSION: Different degrees of renal function correlated with certain types of kidney stones. The urine pH was lower in patients with impaired renal function. Renal function might be an underappreciated factor that affects kidney stone composition and urinary mineral excretion.
Authors: Daniel M Moreira; Justin I Friedlander; Christopher Hartman; Boris Gershman; Arthur D Smith; Zeph Okeke Journal: Urolithiasis Date: 2015-11-16 Impact factor: 3.436
Authors: Andrew E Kummer; Morgan Grams; Pamela Lutsey; Yuan Chen; Kunihiro Matsushita; Anna Köttgen; Aaron R Folsom; Josef Coresh Journal: Clin J Am Soc Nephrol Date: 2015-09-04 Impact factor: 8.237
Authors: Ho Won Kang; Sung Phil Seo; Won Tae Kim; Yong-June Kim; Seok-Joong Yun; Sang-Cheol Lee; Wun-Jae Kim Journal: J Korean Med Sci Date: 2014-07-30 Impact factor: 2.153