Sulphur dioxide fume levels within theatre X-ray processing areas

Abstract

A paper previously published by this journal demonstrated levels of sulphur dioxide (SO 2), above occupational exposure limits within satellite X-ray departments. These excess levels were linked to poorly maintained local exhaust ventilation (LEV) systems. The aim of the current study was to establish fume levels within all theatre X-ray processing areas in Dublin, Ireland and compare data with those of the previous investigation. Dräger diffusion tubes were placed at the illuminator and the entrance and exit processor trays within six theatre darkrooms in Dublin hospitals. Sulphur dioxide results were established, subjected to statistical analysis and compared with the occupational exposure limit of 2 parts per million (ppm). The resultant data indicated that all locations within the theatre darkrooms were substantially below occupational exposure limits and this was associated with proper maintenance of the LEVs in the departments of investigation. Significant inter-location differences were shown within most departments highlighting the importance of X-ray personnel demonstrating good working practices. The need for non-complacency amongst staff has been stressed as it has been shown that adverse health effects may exist amongst vulnerable individuals at a fraction of current occupational exposure limits and below all the levels presented in this study.