key: cord-1055825-j4g6u28u authors: Sung, Chih-Wei; Lu, Tsung-Chien; Fang, Cheng-Chung; Huang, Chien-Hua; Chen, Wen-Jone; Chen, Shyr-Chyr; Tsai, Chu-Lin title: Impact of COVID-19 pandemic on emergency department services acuity and possible collateral damage date: 2020-06-22 journal: Resuscitation DOI: 10.1016/j.resuscitation.2020.06.021 sha: fcd6d6826347a7582e2ff1892ac1db4ed6c7525f doc_id: 1055825 cord_uid: j4g6u28u nan This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. The National Taiwan University Hospital (NTUH) is a 2000-bed tertiary center in Taipei, Taiwan, with approximately 100,000 ED visits annually. We retrospectively collected data regarding ED census and cardiac arrest from the hospital information system from January 2019 to April 2020. Patients with do-not-resuscitate status were excluded. The incidence of in-hospital cardiac arrest (IHCA) in the ED was calculated as the number of IHCA events in the ED divided by the number of ED visits on a monthly basis. The study was exempted from the purview of the hospital's institutional review board. Linear spline regression was used to test the change in slope before and after the COVID-19 pandemic. Amid the COVID-19 pandemic, the number of ED visits decreased significantly from approximately 9,000 to 6,000 visits per month (change in slope, -1,758/month, [3] , as well as government's advisory to stay at home [4] . Nonetheless, the sickest patients cannot avoid a trip to the ED, as shown in our results. The same workload for the high-acuity patients, with additional burden of suspected COVID-19 patients, may overwhelm the ED. As shown in Figure (Panel B) , the number of out-of-hospital cardiac arrest (OHCA) remained largely unchanged during the pandemic (change in slope, +4/month, p=0.07). By contrast, the incidence of IHCA in the ED increased significantly (change in slope, +0.08% per month, p<0.001). The stable trend of OHCA in our study differed from the Italian report showing an increasing trend of OHCA during the pandemic [5] . It may be that the prevalence of COVID-19 in Taiwanese communities was too low to impact the OHCA number. However, the psychological and physical impact of COVID-19 on healthcare providers are substantial that might lead to lapses in care for non-COVID patients. For example, a team of ED staff was allocated to care for suspected COVID patients, leading to staff shortage in other areas of the ED. Also, more time spent on donning and doffing PPE, more cautious inhalation therapy, and a longer laboratory turnaround, all of which may result in possible delay in care and collateral damages, such as an increase in IHCA incidence. In summary, we found that COVID-19 pandemic may alter the distribution of emergency services acuity, with sickest patients still presenting to the ED. Additional burden of caring for suspected COVID patients may inadvertently cause collateral damage, such as an increase in IHCA incidence in the ED. World Health Organization. Coronavirus disease 2019 (COVID-19) situation report-101 Mental Health and the Covid-19 Pandemic Response to COVID-19 in Taiwan: Big Data Analytics, New Technology, and Proactive Testing Out-of-Hospital Cardiac Arrest during the Covid-19 Outbreak in Italy Funding: None.