Metabolic and endocrinological factors related to nephrolithiasis pre and post multiple techniques of bariatric surgery: a sistematic review.

INTRODUCTION: Despite of benefits of bariatric surgery for obesity treatment, the procedure may be related to some complications.

AIM: Analyze studies to address the relation between nephrolithiasis and bariatric surgery.

METHODS: Ten papers about this theme were selected from 2005-2013 in Pubmed, describing the relation of nephrolithiasis or their risk factors with several types of bariatric surgery.

RESULTS: Retrospective studies with minimal follow-up of three years demonstrated 7,65% in surgery patients and 4,63% non-surgery with nephrolithiasis (p<0,05). Prospective studies (8 of 10) revealed large percentage of calculi appearing and significant increase in oxaluria.

CONCLUSION: There is correlation between obesity surgery and nephrolithiasis.