20.500.12556/RUL-136391 The prevalence of COVID-19 among health care personnel in a University Hospital by the end of 2020, and ambient air CO₂ in hospital rooms ventilated by window-opening in 2021/22 Razširjenost Covid-19 med zdravstvenim osebjem Univerzitetnega kliničnega centra Ljubljana do zaključka leta 2020 in koncentracija CO₂ v zraku bolniških sob, prezračevanih skozi okna, v letu 2021/22 In autumn and winter 2020/21 and again in 2021/22 Slovenia has ranked among countries with the highest incidence of COVID-19 per million inhabitants and high excess mortality over the average of previous years. Many patients on non-COVID-19 hospital wards were in fact infected by SARS-CoV-2. Health care personnel at the University Medical Centre Ljubljana (UMCL) were falling ill by Covid-19 in large numbers despite wearing surgical masks and eye protection when dealing with patients. We compared the prevalence of COVID-19 among health care personnel of the Division of Internal Medicine, UMCL by the end of December 2020 with the national average of Slovenia. After instructions had been issued to increase room ventilation by opening windows every hour for at least 10 minutes, ambient air CO₂ was measured in an intensive care room and in an outpatient clinic room during a 10-month period, from April 2021 to February 2022. The prevalence of COVID-19 by the end of December 2020 was 42 % among nurses, 21 % among registered nurses and 17 % among medical doctors, whereas the national of average of the population was significantly lower at 5.5 %. Between April 2021 and February 2022, the average CO₂ (ppm) in the intensive care was 633 (standard deviation 198, range 376 – 1540), while in the outpatient clinic the average was 552 (standard deviation 199, range 380 - 1910). During 2020, before the instructions for the use of personal protective equipment were up-graded and before regular window-opening was advised, the prevalence of Covid-19 among health care personnel at the Division of Internal medicine, UMCL exceeded the national average by 3- to 8-fold. After regular window-opening was advised, the peak CO₂ levels still often exceeded the recommended “safe” level of 750 ppm. Covid-19 airborne spread excess mortality room ventilation CO₂ level Covid-19 razširjenost aerogeno širjenje prezračevanje prostorov koncentracija CO₂ true false true Angleški jezik Slovenski jezik Članek v reviji 2022-04-28 11:04:01 2022-04-28 11:04:05 2022-09-15 04:13:50 0000-00-00 00:00:00 2022 0 0 Str. 265-271 no. 4, spec. iss.: SARS-Cov-2 Vol. 68 Apr. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-04-01 616-036.2:697.921.2 0039-2480 10.5545/sv-jme.2022.64 106109955 Blinc,_Buturovic_Ponikvar,__Fras_-_The_prevalence_of_COVID-19_among_health_care_personnel_in_a_University_Hospital_by_the_end_of_2020,_and_ambient_air_CO2_in_hospital_rooms_ventilated_by_window-opening_in_2021-22.pdf Blinc,_Buturovic_Ponikvar,__Fras_-_The_prevalence_of_COVID-19_among_health_care_personnel_in_a_University_Hospital_by_the_end_of_2020,_and_ambient_air_CO2_in_hospital_rooms_ventilated_by_window-opening_in_2021-22.pdf 1 3CEF782F302A85B1DECD934D16EC7068 ad961fdad89ecc019c04cac3b5899f7f51afd0b82133a4b5462a0f8e58ace07b cd960e44-c6d2-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156013 https://www.sv-jme.eu/sl/article/airborne-spread-of-sars-cov-2-learning-it-the-hard-way/ 1 13bee112-c6d2-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156011 Fakulteta za strojništvo Medicinska fakulteta Strojniški vestnik 0 0 0