1Department of Internal Medicine, University of Iowa Carver College of Medicine and University of Iowa Hospitals and Clinics, 200 Hawkins Drive # C512-GH, Iowa City, IA 52242 USA.
2Department of Microbiology and Infectious Diseases, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Québec Canada.
Antimicrob Resist Infect Control. 2018 Feb 22;7:29. doi: 10.1186/s13756-018-0317-1. eCollection 2018.
Ultraviolet germicidal irradiation (UVGI) systems are gaining popularity, however objective comparisons of their characteristics are lacking. While environmental cultures and reduction of hospital-associated infections rates are excellent study endpoints, they are impractical for centers with limited resources who want to compare or optimize UVGI systems use.
We evaluated radiometry and commercial test cards, two simple and low cost tools, to compare 2 full size UVGI systems (Tru-D and Optimum-UV Enlight) and 2 small units (Lumalier EDU 435 and MRSA-UV Turbo-UV).
Radiometry-derived output curves show that if both large devices emit enough energy to reach lethal doses at 10 ft, the reduction in output in distance is almost perfectly logarithmic. In a patient room environment, Enlight and Tru-D performed similarly when compared using radiometry and commercial test cards. The two small devices reached range around the bathroom with the device raised above the floor, but longer times are needed.
Despite different workflows and price points, no clear superiority emerges between Tru-D and Enlight. Bathroom disinfection should be dealt with separately from the main room and small, cheaper units can be used. Radiometry and commercial test cards are promising ways to compare UVGI systems, but further validation is needed using correlation with environmental cultures.
Not applicable.
紫外线杀菌（UVGI）系统越来越受欢迎，但缺乏对其特性的客观比较。虽然环境培养和降低医院相关感染率是极好的研究终点，但对于资源有限的中心来说，它们不切实际，这些中心希望比较或优化 UVGI 系统的使用。
我们评估了辐射计和商业测试卡这两种简单且低成本的工具，以比较 2 个全尺寸 UVGI 系统（Tru-D 和 Optimum-UV Enlight）和 2 个小尺寸装置（Lumalier EDU 435 和 MRSA-UV Turbo-UV）。
辐射计得出的输出曲线表明，如果两个大型设备发出足够的能量，在 10 英尺处达到致死剂量，那么在距离上的输出减少几乎是完全对数的。在病房环境中，使用辐射计和商业测试卡进行比较时，Enlight 和 Tru-D 的性能相似。当将设备举过地面时，两个小设备可以达到浴室周围的范围，但需要更长的时间。
尽管工作流程和价格点不同，但 Tru-D 和 Enlight 之间没有明显的优势。浴室的消毒应与主房间分开处理，并且可以使用更小、更便宜的设备。辐射计和商业测试卡是比较 UVGI 系统的有前途的方法，但需要进一步验证，以与环境培养物的相关性。
不适用。
