Preventive method environmental oollution bv the air-borne bacteriain dentistry clinic.

牙科诊所空气传播细菌污染环境的预防方法。

基本信息

批准号：
13672170
负责人：
SUYAMA Yuji
金额：
$ 2.24万
依托单位：
TOKYO DENTAL COLLEGE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13672170/
关键词：
infection control medical facility cleanness indoor environment aerosol bacteria pollution Dental clinic

项目摘要

Since the degree of air cleanness depends on the frequency of ventilation,correction fqr the frequency of ventilationwas performed in the establishment of standards. When results of measurement of air-borne bacteria in dental clinics were evaluated according to the tolerant concentration of air-hone bacteria in the U.S. Federal Standard No. 209 B, C, D, E clean rooms,the tolerant concentration was 2.5 cfu/ft3 for class 100,000 but the concentration in the investigated dental clinics was 1.4-32.8 cfu/'ft3. According to the tolerant concentrationproposedby theAmericanAssociationof Surgery (1978), 70%of the investigated dental dines and hospitals were classified as "contaminated surgery". According to the Standards of the JapanHospital Equipment Association (1998), most hospitals were classified as quasi-clean Or general clean areas. In the classification of the degree of air cleanliness associatedwith dental treatment, weighting of thedetectionrate (%) of aandgstreptococci maybenecessary. Accordingto thesestandardswithweighting,all dental clinics investigated in this study were "in an unfavorable state". We tested the eliminating effects by the new electric air cleaner within activated carbon systemwith the plaque solution aerosol . we developed an apparatus by incorporating the bactericidal function of white coal (coal obtained by burning at 800°C or more) with a very high minus potential on its surface into an HEPA filter-type air cleaner,and carried out amodel experiment on its effects in a clean booth. Good results were obtained with an eradication rate of 90% or more for filamentous fungi, coagulase (-) staphylococci, non-fer'mentative rods,Staphylococcus aureus, Bacillus sp, Microcossus sp, Streptococcus sp, Gram-negative rods> Gram-positive rods, Gram- positive cocci, and a-hemolytic streptococci.

由于空气清洁程度取决于通风的频率，因此校正FQR在建立标准方面进行的通风频率。当根据美国联邦标准第209 B，C，D，E清洁室的耐受浓度评估牙科诊所中空气细菌的测量结果时，该班级的耐受浓度为100,000级CFU/FT3，但调查后的牙科诊所的浓度为1.4-32.8 CFUT32.8 CFUT32.8 CFUT32.8 CFT32。根据美国外科协会（1978）所耐受的浓度，被研究的牙科用餐和医院中有70％被归类为“受污染的手术”。根据日本医院设备协会（1998）的标准，大多数医院被归类为准清洁或一般清洁区。在与牙科处理相关的空气清洁程度的分类中，Aandgtropteptocci的TheDetectionRate（％）的加权也许是必要的。根据TheSestandardSwintweighting的说法，这项研究中研究的所有牙科诊所都“处于不利状态”。我们使用斑块溶液气溶胶测试了活性炭系统中新型电动空气清洁剂的消除效果。我们通过将白色煤的细菌功能（通过在800°C或更多的情况下燃烧而获得的煤在其表面上具有很高的负势燃烧到HEPA过滤器型空气清洁剂中，并在干净的摊位上对其效果进行了模型实验，我们开发了一种设备。对于丝状真菌，凝结酶（ - ）葡萄球菌，非含水杆，金黄色葡萄球菌，葡萄球菌SP，Microcossus SP，SP，链球菌SP，链球菌SP，革兰氏阴性杆> Gram-Posivel occi coci，gram-posive coci，gram-posive coci coci和gram-posive coci coci coc，链球菌。