Abstract
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/cm2) with bacilli and gram-positive cocci predominantly. The highest count was detected in the X-ray photographic bed (58 cfu/cm2) and the lowest was in the exposure button (19 cfu/cm2). 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. Key words: Equipment contamination; Radiography; Disinfection
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