Urine osmolality predicts calcium-oxalate crystallization risk in patients with recurrent urolithiasis

Urolithiasis ◽  
2021 ◽  
Author(s):  
Stavros A. Kavouras ◽  
Hyun-Gyu Suh ◽  
Marion Vallet ◽  
Michel Daudon ◽  
Andy Mauromoustakos ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Urine Osmolality ◽  
Calcium Oxalate Crystallization ◽  
Crystallization Risk

DETERMINATION OF THE CALCIUM OXALATE CRYSTALLIZATION RISK FROM URINE SAMPLES: THE BONN RISK INDEX IN COMPARISON TO OTHER RISK FORMULAS

2004 ◽  
Vol 172 (1) ◽  
pp. 355-359 ◽  
Author(s):  
NORBERT LAUBE ◽  
STEFAN HERGARTEN ◽  
BERND HOPPE ◽  
MATTHIAS SCHMIDT ◽  
ALBRECHT HESSE
Keyword(s):  
Calcium Oxalate ◽  
Risk Index ◽  
Urine Samples ◽  
Calcium Oxalate Crystallization ◽  
Bonn Risk Index ◽  
Crystallization Risk

The influence of freezer storage of urine samples on the BONN-Risk-Index for calcium oxalate crystallization

2004 ◽  
Vol 42 (6) ◽  
Author(s):  
Norbert Laube ◽  
Diana J. Zimmermann
Keyword(s):  
Calcium Oxalate ◽  
Risk Index ◽  
Urinary Stone ◽  
Urinary Calcium ◽  
Urine Samples ◽  
Calcium Oxalate Crystallization ◽  
Crystallization Experiment ◽  
Bonn Risk Index ◽  
Crystallization Risk

AbstractThis study was performed to quantify the effect of a 1-weekfreezer storage of urine on its calcium oxalate crystallization risk. Calcium oxalate is the most common urinary stone material observed in urolithiasis patients in western and affluent countries. The BONN-Risk-Index of calcium oxalate crystallization risk in human urine is determined from a crystallization experiment performed on untreated native urine samples.We tested the influence of a 1-weekfreezing on the BONN-Risk-Index value as well as the effect of the sample freezing on the urinary osmolality. In vitro crystallization experiments in 49 native urine samples from stone-forming and non-stone forming individuals were performed in order to determine their calcium oxalate crystallization risk according to the BONN-Risk-Index approach. Comparison of the results derived from original sample investigations with those obtained from the thawed aliquots by statistical evaluation shows that i) no significant deviation from linearity between both results exists and ii) both results are identical by statistical means. This is valid for both, the BONN-Risk-Index and the osmolality data.The differences in the BONN-Risk-Index results of both procedures of BONN-Risk-Index determination, however, exceed the clinically acceptable difference. Thus, determination of the urinary calcium oxalate crystallization risk from thawed urine samples cannot be recommended.

scholarly journals Calcium oxalate crystallization in urine: Role of urate and glycosaminoglycans

1992 ◽  
Vol 41 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Phulwinder K. Grover ◽  
Rosemary L. Ryall ◽  
Villis R. Marshall
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Crystallization

Expression of proteins that inhibit calcium oxalate crystallization in vitro in the urine of normal and stone-forming individuals

2001 ◽  
Vol 37 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Ryan C. Hedgepeth ◽  
Lizhu Yang ◽  
Martin I. Resnick ◽  
Susan Ruth Marengo
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Crystallization

Urinary Inhibitors of Calcium Oxalate Crystallization

Nephrology ◽  
1984 ◽  
pp. 1025-1029
Author(s):  
Charles Y. C. Pak ◽  
John L. Meyer ◽  
Peter G. Werners ◽  
William B. Gill ◽  
Lawrence Resnick ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Crystallization ◽  
Urinary Inhibitors
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