Prevalence of metabolic abnormalities in patients with urolithiasis in Kinshasa, Democratic Republic of Congo

• Published in: The Pan African medical journal 2021, Vol.40, p.75-75
• Main Authors: Diangienda, Pablo Kuntima Diasiama, Moningo, Dieudonné Molamba, Sumaili, Ernest Kiswaya, Mayindu, Alain Ngoma, Punga-Maole, Augustin Monga Lembe, Haymann, Jean-Philippe, Daudon, Michel
• Format: Article
• Language: English
• Subjects: Adult; Body mass index; Citric Acid; Citric Acid - urine; Creatinine; Cross-Sectional Studies; Democratic Republic of the Congo; Diuresis; Diuresis - physiology; Endocrinology and metabolism; Female; Fourier transforms; Hospitals; Human health and pathology; Humans; Hydrogen-Ion Concentration; Kidney stones; Life Sciences; Male; Males; Metabolism; Middle Aged; Patients; Prevalence; Risk Factors; Statistical analysis; Urinary Calculi; Urinary Calculi - chemistry; Urinary tract diseases; Urine; Urine - chemistry; Urogenital system; Urolithiasis; Urolithiasis - epidemiology; Urology and Nephrology; Young Adult
• ISSN: 1937-8688; 1937-8688
• DOI: 10.11604/pamj.2021.40.75.28349

metabolic abnormalities are key factors in urolithiasis patients because they can be modified to prevent the risk of urinary stones. The objectives of this study were to estimate the frequency of metabolic abnormalities in the urine of patients with urolithiasis and to determine their possible link with the chemical composition of stones. we conducted a cross-sectional study evaluating 73 patients referred for urolithiasis in 8 clinics in Kinshasa, between January 2017 and September 2019. Twenty four-hour or early morning urine were collected and analyzed in the Tenon Hospital in Paris. Parameters analyzed included pH, specific gravity, creatinine, uric acid, calcium, phosphate, oxalate, citrate and magnesium. Chi square test or chi-square likelihood-ratio and student's t test were used as statistical tests. overall, 89% (n=65) of patients with lithiasis had metabolic abnormalities. Mean (SD) age of patients was 47.0 (14.2) years with male to female ratio of 1.6: 1. The mean (SD) 24-hour diuresis was 1836.4 (1216.9) ml; the mean (SD) urine density was 1.018 (0.007); and the mean (SD) pH was 6.1(0.8). Hypocitraturia was the most frequently observed metabolic abnormality and was found in 76.7% patients. Other significant metabolic abnormalities were low magnesuria (35.6%), hyperoxaluria (11%), and low sulphaturia (74%). Whewellite (73.5%) was the main chemical component. The mean pH was higher in patients with carbapatite and struvite stones (p=0.031). this study suggests that inadequate diuresis and hypocitraturia were important lithogenic factors. The population should be encouraged to increase water intake to limit the frequency of urine super saturation with crystals.