数字化X线摄影装置表面消毒前后的细菌学检测分析

采用棉拭子倾注法，于2012年对数字化X线摄影系统的成像装置行三氯异氰尿酸消毒液消毒前及消毒后1、2、3和6h的样本，进行细菌学检测。消毒前，菌落数均超标（〉10cfu／cm^2），以杆菌和革兰阳性球菌居多，菌落总数最高为摄影床（58cfu／cm^2），最低为曝光按钮（19cfu／cm^2）；消毒后，放射线服菌落数仍超标，消毒后2h诊断床超标，消毒后3h全部装置超标。提示，数字化X线摄影装置表面细菌污染严重，使用含氯消毒剂可以达到短期有效的消毒效果。

Bacteriological examination of digital X-ray imaging device before and after disinfection

The digital X-ray imaging device was disinfected with trichloro-isocyanuric acid solution. The samples were taken with cotton swab pouring method before and 1 , 2, 3 and 6 h after disinfection and the bacteriological examination was performed. Before disinfection the colony count of samples was all above the standard （ 〉 10 cfu/cm^2 ） with bacilli and gram-positive cocci predominantly. The highest count was detected in the X-ray photographic bed （58 cfu/cm^2） and the lowest was in the exposure button （ 19 cfu/cm^2 ）. After disinfection the colony count in radiation suits still exceeded the standard, the colony count in diagnosis bed 2 h after disinfection, that in all parts of device 3 h after disinfection was off levels. The results indicate that the chlorine disinfectants can only achieve short-term effect in disinfection of digital X-ray imaging device.