Investigation On Health Status Of Air Duct In Large Scale General Hospitals In Suzhou

[Objective] to understand the health status of central air conditioning ventilation system in large scale comprehensive hospitals in Suzhou, analyze its influence factors, and evaluate the effect of applying the intervention measures, thus providing decision-making reference and scientific basis for the health management of the central air conditioning system in Suzhou area.[Materials and methods] using random sampling method to determine survey for 10 Suzhou hospital use of centralized air ventilation system, in accordance with the public concentrated air conditioning ventilation system health standard "requirement, to send the total number of bacteria in the air, total fungi and other four indicators and wind pipe internal security situation of the three indicators were detected, and analyzes the establishment of health management system, the cleaning and disinfection of three influencing factor including. In 50 hospitals, 4 sets of ventilation system were randomly selected from 20 hospitals to take health intervention measures to compare the health situation before and after the intervention.[Results] the current situation investigation: in 2014, 10 large scale comprehensive hospital, all of the centralized air conditioning ventilation system, there are 8 hospitals of the full set of indicators of all testing items are qualified, the total qualified rate was 80%. The total number of airborne bacteria, fungi, and PM10 in the sub items were 89.3%,, 100%, 90.7% and 85.3%, respectively, and the qualified rate of bacterial, fungal and dust in the air was 92%, 98% and 86% respectively. The difference of(P=0.045, Z=2.012), and the total number of(Z) was statistically significant(Z = 3.134, P=0.012), and the difference of the total number of(P=0.037) was statistically significant(=2.432). There were significant differences in the health index of the air outlet and the air tube in the cleaning and the cleaning group. Detection of traffic and ventilation frequency of the indexes showed same confined area traffic large to send the exceeding standard rate of total bacterial count of air air differences, statistical significance(Z=9.375, P = 0.009), air bacteria number from high to low are medical technology, wards, outpatient; total fungi according to from high to low respectively clinics, medical technology, ward; PM10 exceeded at the rate from high to low are technicians, and wards, outpatient. The effect of health intervention measures: the results showed that the 20 hospitals in 4 central air-conditioning ventilation system before and after the intervention, the intervention of air bacteria and fungi, and the wind pipe dust in the air of the difference, with statistical significance(Z=2.543, P=0.0352; Z=3.241; P=0.0087; Z=4.233; P=0.000;).[Conclusion] Suzhou large comprehensive hospital concentrated air conditioning and ventilation system air outlet exist certain pollution, wind pipe accumulated dust and mild pollution. There was moderate positive correlation between the total number of bacteria and the total number of bacteria and the total number of bacteria and fungi in the air supply outlet air. The factors that affect the health status of central air conditioning ventilation system in hospitals are as follows: 1. The most important internal factors for the hospital to focus on the implementation of health management, external factors for cleaning and disinfection is standardized. From the strict implementation of hospital central air conditioning health management, regular cleaning, strengthening health supervision and effective ventilation of these 3 aspects of the intervention can effectively reduce the pollution rate of the centralized air conditioning ventilation system.