Norbert Laube

Summary

Country: Germany

Publications

  1. ncbi request reprint Can the Bonn Risk Index be replaced by a simple measurement of the urinary concentration of free calcium ions?
    Norbert Laube
    Division of Experimental Urology, Department of Urology and Geodynamics, University of Bonn, Bonn, Germany
    J Urol 173:2175-7. 2005
  2. ncbi request reprint Determination of the calcium oxalate crystallization risk from urine samples: the BONN Risk Index in comparison to other risk formulas
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    J Urol 172:355-9. 2004
  3. doi request reprint Calcium oxalate stone formation risk - a case of disturbed relative concentrations of urinary components
    Norbert Laube
    Department of Urology, Experimental Urology, University of Bonn, Bonn, Germany
    Clin Chem Lab Med 46:1134-9. 2008
  4. ncbi request reprint Influence of grapefruit-, orange- and apple-juice consumption on urinary variables and risk of crystallization
    Ruth Hönow
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Str 25, D 53 105 Bonn, Germany
    Br J Nutr 90:295-300. 2003
  5. ncbi request reprint The influence of freezer storage of urine samples on the BONN-Risk-Index for calcium oxalate crystallization
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Clin Chem Lab Med 42:665-9. 2004
  6. ncbi request reprint The alteration of urine composition due to stone material present in the urinary tract
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Eur Urol 44:595-9. 2003
  7. ncbi request reprint Comparison of laser-probe and photometric determination of the urinary crystallization risk of calcium oxalate
    Norbert Laube
    Department of Urology, University of Bonn, Germany
    Clin Chem Lab Med 40:595-9. 2002
  8. ncbi request reprint Influence of a variable differential function on the stone-growth-related urinary depletion effect
    Michael Pullmann
    Geodynamics and Physics of the Lithosphere, Division of Experimental Urology, Department of Urology, University of Bonn, Germany
    Clin Chem 50:1675-8. 2004
  9. ncbi request reprint Influence of urinary stones on the composition of a 24-hour urine sample
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Strasse 25, D 53105 Bonn, Germany
    Clin Chem 49:281-5. 2003
  10. ncbi request reprint Citric acid or citrates in urine: which should we focus on in the prevention of calcium oxalate crystals and stones?
    Norbert Laube
    Division of Experimental Urology, Department of Urology, Bonn University, Sigmund Freud Strasse 25, 53105 Bonn, Germany
    Urol Res 30:336-41. 2002

Collaborators

Detail Information

Publications20

  1. ncbi request reprint Can the Bonn Risk Index be replaced by a simple measurement of the urinary concentration of free calcium ions?
    Norbert Laube
    Division of Experimental Urology, Department of Urology and Geodynamics, University of Bonn, Bonn, Germany
    J Urol 173:2175-7. 2005
    ..Due to the high relationship between [Ca] and (Ox) one may argue that determining only 1 of the 2 BRI parameters, preferably [Ca], is sufficient to describe the urine crystallization risk...
  2. ncbi request reprint Determination of the calcium oxalate crystallization risk from urine samples: the BONN Risk Index in comparison to other risk formulas
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    J Urol 172:355-9. 2004
    ....
  3. doi request reprint Calcium oxalate stone formation risk - a case of disturbed relative concentrations of urinary components
    Norbert Laube
    Department of Urology, Experimental Urology, University of Bonn, Bonn, Germany
    Clin Chem Lab Med 46:1134-9. 2008
    ..Our model embraces different triplet combinations of fundamental urinary risk factors for calcium oxalate (CaOx) crystallization, to characterize different levels of urinary stone formation risk...
  4. ncbi request reprint Influence of grapefruit-, orange- and apple-juice consumption on urinary variables and risk of crystallization
    Ruth Hönow
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Str 25, D 53 105 Bonn, Germany
    Br J Nutr 90:295-300. 2003
    ..We showed that both grapefruit juice and apple juice reduce the risk of CaOx stone formation at a magnitude comparable with the effects obtained from orange juice...
  5. ncbi request reprint The influence of freezer storage of urine samples on the BONN-Risk-Index for calcium oxalate crystallization
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Clin Chem Lab Med 42:665-9. 2004
    ..Thus, determination of the urinary calcium oxalate crystallization risk from thawed urine samples cannot be recommended...
  6. ncbi request reprint The alteration of urine composition due to stone material present in the urinary tract
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Eur Urol 44:595-9. 2003
    ..Based on a recently introduced mathematical model approach we show that uroliths located in the urinary tract (UT) can substantially deplete the urinary concentrations of lithogenic constituents by continuous growth...
  7. ncbi request reprint Comparison of laser-probe and photometric determination of the urinary crystallization risk of calcium oxalate
    Norbert Laube
    Department of Urology, University of Bonn, Germany
    Clin Chem Lab Med 40:595-9. 2002
    ..The assumed 98% criterion allows the determination of the Bonn-Risk-Index with adequate accuracy...
  8. ncbi request reprint Influence of a variable differential function on the stone-growth-related urinary depletion effect
    Michael Pullmann
    Geodynamics and Physics of the Lithosphere, Division of Experimental Urology, Department of Urology, University of Bonn, Germany
    Clin Chem 50:1675-8. 2004
  9. ncbi request reprint Influence of urinary stones on the composition of a 24-hour urine sample
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Strasse 25, D 53105 Bonn, Germany
    Clin Chem 49:281-5. 2003
    ..Consequently, urine will exhibit depleted concentrations of lithogenic constituents when urinary stones are present in the patient's urinary tract...
  10. ncbi request reprint Citric acid or citrates in urine: which should we focus on in the prevention of calcium oxalate crystals and stones?
    Norbert Laube
    Division of Experimental Urology, Department of Urology, Bonn University, Sigmund Freud Strasse 25, 53105 Bonn, Germany
    Urol Res 30:336-41. 2002
    ..48 mmol/l...
  11. ncbi request reprint The use of risk indices: do they predict recurrence? Yes, they (at least some) do
    Norbert Laube
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Strasse 25, 53105, Bonn, Germany
    Urol Res 34:118-21. 2006
    ..We are confident that, with consistent research efforts, science will be able to predict recurrence of stone formation more accurately within the next couple of years...
  12. ncbi request reprint Computation and modeling of the stone-growth related urinary depletion effect using "depletion V1.0"
    Norbert Laube
    Division of Experimental Urology, Department of Urolog, University of Bonn, Germany
    Eur J Med Res 11:534-9. 2006
    ..In recent publications, we introduced a complex physical approach and provided mathematical equations which can be solved analytically. However, to date, solving the equations with a pocket calculator remains cumbersome...
  13. ncbi request reprint Determination of urinary calcium-oxalate formation risk with BONN-Risk-Index and EQUIL applied to a family
    Norbert Laube
    Division of Experimental Urology, Department of Urology, Bonn University, Germany
    J Chem Inf Comput Sci 42:633-9. 2002
    ....
  14. ncbi request reprint Absorptive hyperoxaluria leads to an increased risk for urolithiasis or nephrocalcinosis in cystic fibrosis
    Bernd Hoppe
    University Children s Hospital Cologne, Germany, USA
    Am J Kidney Dis 46:440-5. 2005
    ..To better elucidate its pathophysiological characteristics, we prospectively studied patients with CF by determining these parameters and performing renal ultrasonography twice yearly...
  15. ncbi request reprint Oxalate and its handling in a low stone risk vs a stone-prone population group
    Sonja Lewandowski
    Department of Chemistry, University of Cape Town, Private Bag, Rondebosch 7701, Cape Town, South Africa
    World J Urol 23:330-3. 2005
    ..95%, P = 0.87). These results suggest that South African black subjects handle dietary oxalate more efficaciously than white subjects and that this occurs via some endogenous mechanism, which has not yet been identified or characterized...
  16. ncbi request reprint Oxalate degrading bacteria: new treatment option for patients with primary and secondary hyperoxaluria?
    Bernd Hoppe
    University Children s Hospital Cologne, Division of Pediatric Nephrology, University of Cologne, Kerpenerstrasse 62, 50931 Cologne, Germany
    Urol Res 33:372-5. 2005
    ..O. formigenes might be a promising new therapeutic tool in patients with primary and secondary hyperoxaluria...
  17. ncbi request reprint Why does the Bonn Risk Index discriminate between calcium oxalate stone formers and healthy controls?
    John P Kavanagh
    Department of Urology, South Manchester University Hospitals Trust, Wythenshawe Hospital, Manchester, United Kingdom
    J Urol 175:766-70. 2006
    ..For instance, why should 2 samples sharing the same BRI but with different ionized calcium and oxalate values have the same likelihood of being obtained from a stone former?..
  18. ncbi request reprint Diagnostic and therapeutic approaches in patients with secondary hyperoxaluria
    Bernd Hoppe
    University Children s Hospital, Pediatric Nephrology, D 50924 Cologne, Germany
    Front Biosci 8:e437-43. 2003
    ....
  19. doi request reprint The case: A boy with recurrent stones
    Bodo B Beck
    Division of Pediatric Nephrology, Department of Pediatrics, University Hospital Cologne, Cologne, Germany
    Kidney Int 74:133-4. 2008
  20. ncbi request reprint Hypocitraturia as a risk factor for nephrocalcinosis after kidney transplantation
    Ludwig Stapenhorst
    Division of Pediatric Nephrology, Department of Pediatrics, University Children s Hospital, 50924, Cologne, Germany
    Pediatr Nephrol 20:652-6. 2005
    ..Both findings can increase the risk for urolithiasis or nephrocalcinosis...