Determination of Urinary Calcium-Oxalate Formation Risk with BONN-Risk-Index and EQUIL Applied to a Family

2002 ◽  
Vol 42 (3) ◽  
pp. 633-639 ◽  
Author(s):  
Norbert Laube ◽  
Vera Labedzke ◽  
Stefan Hergarten ◽  
Albrecht Hesse
Keyword(s):  
Calcium Oxalate ◽  
Risk Index ◽  
Urinary Calcium ◽  
Bonn Risk Index

Bonn Risk Index Based Micromethod for Assessing Risk of Urinary Calcium Oxalate Stone Formation

2010 ◽  
Vol 183 (3) ◽  
pp. 1157-1162 ◽  
Author(s):  
T. Porowski ◽  
P. Mrozek ◽  
J. Sidun ◽  
W. Zoch-Zwierz ◽  
J. Konstantynowicz ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Stone Formation ◽  
Risk Index ◽  
Urinary Calcium ◽  
Calcium Oxalate Stone ◽  
Bonn Risk Index

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 The Bonn-Risk-Index for determination of the risk of urolith formation and other metabolic diseases

2014 ◽  
Vol 5 (S1) ◽  
Author(s):  
Norbert Laube ◽  
Wolfgang Berg ◽  
Thomas Knoll ◽  
Heinz Busch
Keyword(s):  
Metabolic Diseases ◽  
Risk Index ◽  
Bonn Risk Index
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