University of Cincinnati College of Medicine, Department of Emergency Medicine, Cincinnati OH 45267-0769, USA.
Am J Emerg Med. 2010 Nov;28(9):1037-40. doi: 10.1016/j.ajem.2009.06.008. Epub 2010 Mar 9.
The National Council on Radiation Protection (NCRP) limits health care-associated occupational exposures to radiation to 5000 mrem/y. Previous studies suggested that emergency physicians were not exposed over this limit. Their relevance to contemporary practice is unknown. We hypothesized that emergency physicians are currently exposed to radiation levels above the NCRP limits.
This prospective cohort study was conducted at an urban, academic, level I trauma center emergency department (ED). Thermoluminescent dosimeter radiation badges were placed on the torso and ring finger of all physicians staffing the ED during May 2008. Thermoluminescent dosimeter badges were affixed to 8 portable phones that are carried by physicians in the ED 24 hours a day. At the end of the study period, exposure dose for each subject was estimated.
Seventy-five physicians enrolled in the study; 41 residents worked a median of 94 hours and 34 attendings worked a median of 54 hours. Compliance for physician badge wearing was 99%, ring wearing was 98%, and phone wearing was 100%. Two subjects had detectable levels of radiation on their torso thermoluminescent dosimeters of 4 and 1 mrem, respectively. One phone badge had a detectable level of 1 mrem. The annual extrapolated exposure for the subject with the highest radiation level would have been 50 mrem, below the 5000 mrem exposure limit for health care workers.
Emergency physicians working in an urban, academic, level I trauma center ED do not appear to be at risk of exceeding the NCRP dose limits for ionizing radiation exposure to their torso or extremities.
国家辐射防护委员会（NCRP）将医疗相关职业辐射暴露限制在 5000mrem/y。先前的研究表明，急诊医师的暴露水平并未超过该限制。但他们与当代实践的相关性尚不清楚。我们假设，急诊医师目前的辐射暴露水平高于 NCRP 限制。
这是一项在城市学术一级创伤中心急诊部（ED）进行的前瞻性队列研究。2008 年 5 月，在 ED 工作的所有医师的躯干和无名指上放置了热释光剂量计辐射剂量牌。24 小时随身携带的 8 部医师手机上也贴有热释光剂量计剂量牌。研究结束时，估计每位受试者的暴露剂量。
75 名医师参加了这项研究；41 名住院医师平均工作 94 小时，34 名主治医生平均工作 54 小时。医师剂量牌佩戴率为 99%，无名指佩戴率为 98%，手机佩戴率为 100%。两名受试者的躯干热释光剂量计检测到 4 和 1mrem 的辐射水平。一个手机剂量牌检测到 1mrem 的辐射水平。暴露水平最高的受试者的年辐射暴露量估计为 50mrem，低于卫生保健工作者 5000mrem 的辐射暴露限制。
在城市学术一级创伤中心 ED 工作的急诊医师似乎不会有超过 NCRP 对其躯干或四肢的电离辐射暴露限制的风险。
