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In Association with
An innovative method for disinfecting the stethoscope membrane: A pilot study
3rd International Conference on Epidemiology & Public Health
Andrea Serafini1, G Messina1, S Burgassi, D Messina2, N Nante1 and G Cevenini1
Posters-Accepted Abstracts: Epidemiology (Sunnyvale)
Abstract
Background: The literature demonstrated that stethoscope, the most used medical device, can be more contaminated than
hands. There is a big concern on disinfecting the health professional hands, contrarily, lack of time and attention make the
stethoscope disinfection quite rare, although it should be disinfected before every visit. This pilot study, evaluates an innovative
solution for stethoscopes’ membrane disinfection in a real environment.
Methods: An ultraviolet (UV) device was used for disinfecting the membrane of the stethoscope head. When the device couples
the stethoscope head, an UV-C LED (wavelength 280 nm) automatically lights up to disinfect the stethoscope membrane. The
device’s effectiveness was tested on a stethoscope used on 10 volunteers. The stethoscope was used for hearing the heart and
respiratory sounds twice. The first time the stethoscope was treated with the UV device which irradiated its membrane for 5
minutes and then it was placed on Petri dishes to detect Colony Forming Units (CFU) at 36°C after 24 hours; the second time,
the stethoscope membrane, was directly placed on petri dishes for obtaining matching controls. Petri dishes of treated/not
treated stethoscope were compared using the Wilcoxon signed-rank test. Statistical significance was set at 95%.
Results: 5 out of 10 cases had a low bacterial contamination on control petri dishes (CFU 3 to 35) and the corresponding UV-C
treated ones did not have any bacterial growth. On average, overall bacterial reduction was 91.7% (p<0.05).
Conclusions: The device was able to sterilize membrane with low bacterial load and significantly reduce microbial presence
in the others.
Biography
Andrea Serafini MD is graduated in 2011 at the University of Siena. He is attending the Post Graduate School of Public Health in Siena. During his career, he
participated at the European Public Health Association (EUPHA) Conferences in 2013 (Brussels) and in 2014 (Glasgow) with 1 pitch presentation and 2 oral
presentations. In 2013 he attended a course in Basel about ARCGis in Public Health.
