Background: Indoor air quality in schools is an important environmental health concern because children spend a substantial proportion of their time in classrooms and are particularly vulnerable to air pollutants. Objective: To assess common chemical, and biological pollutants in the indoor air of general education schools in Ulaanbaatar. Methods: A cross-sectional study was conducted from October 10, 2025, to March 1, 2026, in 16 purposively selected schools and 32 classrooms across six districts of Ulaanbaatar. PM2.5, PM10, CO₂, and microclimatic parameters were monitored continuously for seven days. Volatile organic compounds, formaldehyde, BTEX compounds, and radon were also measured. Airborne microorganisms were assessed using 160 air samples, and 160 surface swabs were collected. Results were compared with MNS 7106:2026, MNS 5484:2005, and MNS 6410:2018 standards. Results: The mean 24-hour concentrations of PM2.5 and PM10 were 25.2 and 36.1 µg/m³, respectively. PM2.5 exceeded the permissible level during winter and in schools located in apartment areas, whereas the mean PM10 concentration met the acceptable level. Total bacteria were detected in all air samples, with a mean concentration of 1,733.25 CFU/m³. Mould and fungi were detected in 56.3% of classrooms, and enteric bacteria were detected in 4.3% of surface swabs. Radon levels remained below the permissible limit, and pathogenic bacteria were not detected. Formaldehyde was detected in all samples, while total VOCs and toluene were detected in 81.3%; their mean concentrations remained within acceptable levels. In one classroom, the concentration of benzene was detected approximately 30 times higher the permissible level. Conclusion Although some indoor air-quality indicators met the relevant standards, PM2.5, total bacteria, mould and fungi, surface enteric bacteria, and benzene contamination require improvement and may pose health risks to children. Regular ventilation, improved cleaning and hygiene, proper maintenance of HEPA devices, and routine monitoring of particulate matter, mould, and VOCs are needed.

Background: Patient safety is a core dimension of healthcare quality and has become a global priority. According to the report by the U.S. Institute of Medicine, between 44,000 and 98,000 deaths occur annually due to medical errors in hospitals. One of the key indicators of patient safety is the Adverse Events (AE), defined as unintended harm to a patient that results from medical care rather than from the underlying disease. The assessment of adverse events is not only a tool for detecting errors but also an active strategy for improving system reliability and safety. Accurate identification of adverse events is therefore essential for enhancing patient safety and serves as a critical performance indicator with financial implications for hospitals. Aim: To determine the incidence of adverse events in referral hospitals and to analyze the relationship between triggers and adverse events. Material and Methods: Data were collected during 2023–2024 from three referral hospitals, the First, Second, and Third State Central Hospitals after obtaining institutional approval. The study was conducted within the framework of the Whole System Measures methodology developed by the Institute for Healthcare Improvement (IHI), which is internationally used for system-wide performance assessment. Data extraction was performed from electronic health records and inpatient departments, and statistical analyses were conducted using SPSS version 25. Results: The study identified 8.3% adverse events per 1,000 patient-days, which is 1.66 times higher than the international reference rate. A statistically significant association was observed between the number of triggers and the occurrence of adverse events, indicating that the use of triggers facilitates the active detection of adverse events. Conclusion The incidence of adverse events in tertiary specialized hospitals was found to be higher than international benchmarks. The application of trigger-based active surveillance proved to be an effective method for identifying adverse events and enhancing patient safety monitoring systems.

BackgroundTrauma, traffic accidents are among main concerns to attach greater attention. Prompt medical assistance plays essential role in reducing consequences of road accident, as well as trauma and saving lives. In the recent years the number of traffic accidents has been steadily growing in Mongolia. The traffic accident mortality rate has been increasing.GoalWith this paper we aimed to reveal main difficulties the Emergency Medical Service of Mongolia encounter in providing effective, speedy medical assistance to the injured in road accidents; define ways and opportunities of improving quality of medical help.Materials and methodsWithin the framework of the study, activities have been implemented in three directions. Firstly: At Emergency Medical Service emergency call registration book for 2009-2010 was analyzed. Date, place, the number of victims, age, gender composition, time of emergency assistance arrival at crash scene, length of first and pre- hospital aid rendered at crash scene and others were focused on. It facilitated to determine combined time of emergency call and medical assistance at crash site. In order to define attitude, views of emergency medical personnel data have been collected through individual or group interview.ResultsTotal number traffic accidents registered in emergency medical service were 1618 between 2009 and 2010. Males comprised 65% and 35% females, age ranged between 3-86 (average age 32.8±14). Large number of traffic accidents occurred in Bayanzurh and Songinohairhan districts. Most traffic accidents occurred in April, August and October. Total time spent in emergency medical service in traffic accidents were 28.4±20.3 minutes. 43.6% of total emergency medical service were in 20 minutes but 56.4% were more than 21 minutes.ConclusionThe result of the study indicates that emergency medical assistance arrival is mainly delayed due to many factors including broad range or area of service, insufficient number of doctors, ambulance vehicles, traumatic hospitals and traffic jam. Non-for emergency assistance calls occupying majority of emergency calls can also be attributed as one of negative factors.

Background: In Mongolia, leading cause of morbidity prevalence is respiratory system disease by 2010. The prevalence is 1027,73 per 10000 people. Comparison to 2000, it has been increased by 1,5-2 times. Another word, it shown that respiratory diseases hadn’t been decreased, but progressively increased in the last 10 year.By WHO estimation in 2008, future trend of mortality rate of the respiratory system disease would taken 3rd place in the leading causes of the mortality by 2030. Most common symptoms of the respiratory diseases are cough and sputum.Aim of the study: Aim of this study is to investigate some effects Sorool-4 drug on some respiratory diseases.Method of study: Experimental research method was used in this study. 30 laboratory white mouse, each weigh is 18-22 grams and 40 Vistar species rats, each weigh is 180-220 g were used in the study in where Inner Mongolian National University of China.0.25% Ammonium hydrochloridium solvent was inhaled to each mices for 10 seconds. After 3 day inhalation procedure, Sorool-4 drug was injected 10 grams per kg to mices, and Libexin was administered 4.3mg/kg per one time in next 3 day. During these 3 days, we measured cough for 3 minutes to each mices by ZOLY- 3 devices in everyday.White mices were classified into 3 groups, and then0.1 ml/10gram phenol aldehyde solution 0.2-0.25 ml per each mice injected to abdominal cavity. After 3 day injection, sorool-4 was administered 10 gram per kg and bromhexine 0.12 mg per kg, 3 times a day, for 3 days.Bacterial colony: Coagulase positive S.aureus DU 5789 and coagulase negative mutant DU5843 species were used in this study. These bacterias has stored in-700C in brain and heart infusion, and 10% glycerol and 5% non-fat milk were feed until used.Culture: According to CASH method, some changes were made. S.aureus was cultured in the TSA, BBL agar in +370C for 24 hours and diluted with pure non- endotoxin saline and centrifuged at 3000rpm for 7 days, +40C, 10 min per day. And then again diluted with cold pure saline, and diluted to 2х109-4х109 CFU ml by turbid meter. Prepared suspension has warmed to 450C, and mixed 10 ml suspension with 4% 10ml melted NOBLE agar.Experimental model: 0.2-10ml/10ml/g agar wasinjected to every mice tail vein.To develop cough model, 0.25% ammonium hydrochloridium solution was inhaled 10 sec for 3 days in YLS-8A device. After 3 day, in three groups, mices of the each group coughed mean 25.6±3.6 amount. Sorool-4 drug and Libexin were administered 10mg/kg to treatment group 1 and 4.3 mg/kg to treatment group 2, each respectively. After administration these drugs, counted cough amount of each mice for 3 min in YLS- 8A device in 3 day.Conclusion: Because of amount of sputum of treatment group 1 and 2 is more than control group, Sorool-4 is not efficient as same as bromhexine, but this showed that it has mucus expectorant effect.As shown results, sorool-4 has anti-inflammatory effect. It would be more effective using sorool-4 with antibiotic.