Controlled metabolic diet reduces calcium oxalate supersaturation but not oxalate excretion after bariatric surgery.

Urology
Ran PangJohn C Lieske

Abstract

To identify the effect of a controlled metabolic diet on reducing urinary calcium oxalate (CaOx) supersaturation in subjects with hyperoxaluric nephrolithiasis after potentially malabsorptive forms of bariatric surgery. Subjects with a history of CaOx kidney stones and mild hyperoxaluria after bariatric surgery (n = 9) collected baseline 24-hour urine samples while consuming a free choice diet. They were then instructed to consume a controlled diet low in oxalate (70-80 mg/d), normal in calcium (1000 mg/d), and moderate in protein before 2 final 24-hour urine collections. Overall, the urinary CaOx supersaturation decreased from 1.97 ± 0.49 delta Gibbs (DG) with the free choice diet to 1.13 ± 0.75 DG with the controlled diet (P < .01). This occurred in the absence of a significant change in urinary oxalate excretion (0.69 ± 0.29 mmol/d with the free choice diet compared with 0.66 ± 0.38 mmol/d with the controlled diet). Urinary volume, citrate, and pH all increased, although not significantly (P > .05), contributing to the significant CaOx supersaturation change. A controlled metabolic diet normal in calcium, moderate in protein, and reduced in oxalate can positively affect urinary CaOx supersaturation after bariatric surgery. H...Continue Reading

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Citations

Mar 25, 2014·Current Urology Reports·Ricardo D Gonzalez, Benjamin K Canales
May 15, 2013·Current Rheumatology Reports·Elizabeth C LorenzJohn C Lieske
Dec 10, 2015·Urolithiasis·John R Asplin
Jun 28, 2014·Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery·Benjamin K Canales, Marguerite Hatch
Feb 24, 2015·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Lama NazzalDavid S Goldfarb
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Nov 27, 2019·Skeletal Radiology·Eun Ji ChoiHye Won Chung
Sep 10, 2020·Clinical Journal of the American Society of Nephrology : CJASN·Celeste WittingJohn C Lieske
Dec 29, 2020·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Matthew R D'CostaJohn C Lieske
Jun 5, 2021·Kidney360·Megan Prochaska, Elaine Worcester

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