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Risk Factors For Urinary Stone Formation In The Morbidly Obese

July 25, 2017

UroToday - Presented Monday, 03 September 2007 at the 29th Congress of the Societe International d'Urologie - SIU 2007 - Optimizing Clinical Outcomes in Prostate and Renal Cell Carcinomas - The Second Annual Symposium on Advanced GU Malignancy - Palais des Congres de Paris, France

Introduction: Objective: To prospectively analyze urinary parameters that predispose to stone formation in the morbidly obese.

Methods: Thirty-two females and thirteen males scheduled to undergo bariatric surgery submitted a 24-hour urine collection for metabolic stone risk analysis (Mission Pharmacal) along with a 24-hour dietary intake diary. Body mass index (BMI) and medical history were recorded. A registered dietician converted dietary intake diaries from the raw food intake amounts to their corresponding metabolic equivalent.

Results: The mean age was 46.9 ± 10.5 years and mean BMI (kg/m2) was 46.4 ±10.1. All patients met the NIH classification of morbid obesity (BMI ≥ 40). All subjects had at least 1 abnormality identified in their urine profile that placed them at high risk for stone formation. The mean total volume was 1.5 ± 0.7 L/day, with 71.1% of patients demonstrating low urine volumes (