[Evaluation of a pulsed xenon ultraviolet light- emitting no-touch, portable device for disinfection of surfaces in operating rooms in the Policlinico University Hospital of Foggia, Italy, 2019. Preliminary results]. / Efficacia di un sistema di trattamento no-touch con unità mobile a luce UV pulsata allo Xeno per la disinfezione delle superfici nelle sale operatorie: risultati preliminari nel Policlinico Riuniti di Foggia, 2019.

ABSTRACT

OBJECTIVES: To evaluate the effectiveness and the frequency of use of a pulsed xenon ultraviolet light-emitting no-touch portable device (PX-UV), applied after perform current cleaning, in reducing environmental bacterial burden and the presence of pathogens on surfaces in the operating rooms at the Policlinico University Hospital of Foggia. DESIGN: Prospective before-and-after study with a follow up duration of four months, from May to August 2019. SETTING AND PARTICIPANTS: Two operating rooms of an Orthopaedic and a Neurosurgical ward in a 780-bed university hospital in the District of Foggia, Italy (about 600,000 inhabitants). MAIN OUTCOME MEASURES: According to the hygienic standards proposed by the Italian Workers Compensation Authority (ISPESL), the total and the average bacterial load and the presence of six pathogens were evaluated between pre- and post- PX-UV use combined with routine manual cleaning. RESULTS: The PX-UV system was applied at five distinct time points t1 start of the experiment, t2 after 28 days, t3 after 13 days, t4 after 7 days, and t5 after 8 days (t2-t5 28 days in total). About 16-min of PX-UV cycle showed significant reduction in the level of environmental contamination by decreasing the mean colony count by 87.5%, compliant with the standard (5< X ≤15 CFU per plat). Staphylococcus aureus and Acinetobacter baumannii that had been isolated in some of the samplings before PX-UV were no longer detected after t1, t2 and t5 treatments. Before PX-UV, the mean colony count was similar between t1 and t2 (p>0.05); after t3 and t4 treatments, it was lower before t5 in both the Orthopaedic and Neurosurgical operating rooms (= -97% and -75%, respectively; p<0,01). CONCLUSIONS: Implication for practice PX-UV could supplement the standard cleaning process in reducing the microbial burden in the operating rooms and potentially achieving lower healthcare-associated surgical site infections rates.