Risk of nephrotith disease increases relating with using high hardened water, not suitable diet, being sensitive for some kind of food products. Then for Mongolia, particularly Bulgan province which is located in basin of the Selenge river is consisted in regions which have high hardened water. Sickness rate of renal diseases especially nephtolith disease is high in population of Selenge soum of Bulgan province. It was main reason of choose this subject and investigate non organic substances in urine of population and determine risks of nephtolith disease for them. To determine оne of the factors affecting the formation of the disease is to study the composition of drinking water and investigate non organic substances in urine. We used cross-sectional methodology for our study. Our study was conducted from June, 2013 to November, 2014. Household water used portable water dissemination and homes with private wells and water samples from the river.Drinking water analyzed of the chemistry parameters (13 substances) in the chemistry and toxicology laboratories in Orkhon aimag. There was 300 urine analyze was done and 62 of them was confirmed nephtolith disease with it. We investigated non-organic substances in their urine. Interviews people in the study, the average age was 43.26±14.7. 64.2% of participants was answered that they use ground water (private groundwater wells), 25.4% use external water (the well water), 8.1% use river water, 2.3 use pure water when asked about their water supply. Composition of samples from drinking water standard was near to the standard assessments by comparing the maximum amount of. We were considered the most important water pH, solids, iron, chlorine analysis compares removable wells and private wells. Hardness for 53.3% of the well of 2.5-3.5 mg/l with hard water, private wells, 60.0% of 4.6-5.5 mg/l solids by of water. Wells chlorides portable 66.7% 14.4-25.3 mg/l, and private wells 13.3% of 4.3-14.3 mg /l. 20.7 percent of survey identified as the kidney and urinary tract diseases. Urat salt (32.1%), compound of urat and sodium (32.1%), oxalate (14.5%), sodium (13.4%), compound of oxalate and sodium (6.4%), phosphate (1.5%) was determined in urine analyze. It was close to the water content of the standard performance. The well water solids of 2.5-3.5 mg/l and private groundwater wells solids of 4.6-5.5 mg/l. And the well chlorides 14.4-25.3 mg/l and private groundwater wells chlorides 4.3-14.3 mg/l.Urat and compound of urat and sodium are dominated in composition of stone during nephrolith disease (p=0.043).

Introduction: In Mongolia, data on the etiology and risk factors of cardioembolic stroke (CES) is scarce and few clinical studies have been performed to date. Timely identification and control of cardiovascular risk factors are priority objectives for adequate primary and secondary prevention of CES. Goal: The goal of this study was to describe risk factors for CES in our setting. Results: The case-control study enrolled a total of 525 subjects. CES was detected in 63 (35.7%) out of 176 (33.5%) ischemic stroke patients with a predominance in age group of 60-69 and men (33%). The main risk factor of CES was non-valvular atrial fibrillation (AF). AF especially paroxysmal AF increased the risk of CES by 4.6 times (p=<0.0001, OR 4.6, 95% CI 1.4-44.6). The second main cerebrovascular risk factors were hypertension and dyslipidemia. Conclusion CES accounted for 1/3 of ischemic stroke. The commonest underlying medical conditions were non-valvular atrial fibrillation, hypertension, dyslipidemia, alcohol consumption and obesity. Hence, all patients with hypertension and non-valvular AF should be meticulously screened for prevention of CES.