COVID-19, which emerged in China in December 2019, has become a pandemic with its spread to many countries of the world. Emergency departments also carried out an important part of the fight against pandemics in our country/Turkey. The emergency department including an intensive care unit is very few in this country/Turkey and the only hospital, which has an Emergency Intensive Care Unit (EICU) in Istanbul, is the study center. Therefore, this retrospective study aimed to provide useful information about how an effective EICU should be, especially how to use them during pandemic periods.

COVID-19, which emerged in China in December 2019, has become a pandemic with its spread to many countries of the world. Emergency departments also carried out an important part of the fight against pandemics in our country/Turkey. The emergency department including an intensive care unit is very few in this country/Turkey and the only hospital, which has an Emergency Intensive Care Unit (EICU) in Istanbul, is the study center. Throughout the pandemic, many patients, including COVID-19 patients, were successfully followed up and discharged from EICU. With this study, the investigators expect to show the role of EICU during the pandemic. In addition, it will be seen that whether the patients, who are waiting for hospitalization or waiting for referral, are admitted to EICU faster and their treatments will be started promptly. Therefore, this retrospective study aimed to provide useful information about how an effective EICU should be, especially how to use them during pandemic periods.

Inclusion Criteria:

• All patients who followed up in emergency department ICU with the diagnosis of COVID-19
• Accepted to participate with an informed consent

Exclusion Criteria:

• Patients under the age of 18 or more than 50 years
• declined to participate
• deaths caused by other than COVID-19

All patients who followed up in emergency department ICU's of study centers with the diagnosis of COVID-19