Combination of Chest Scanography and Nasal Viral Detection Test to Detect COVID-19 Positive Patients Before Surgical Intervention in a University Hospital During Coronavirus Pandemia

This research aims to improve the screening for COVID-19 upon admission to the Montpellier University Hospital for an act under general anesthesia or at high risk of transmission of the virus. Indeed, routine nasal swabs present many false negatives (60 to 70%) and many patients with the coronavirus have little or no symptoms. Performing a chest CT scan can reveal early signs very suggestive of viral pneumoniae due to the new coronavirus without additional risk compared to a simple chest X-ray (no injection of contrast medium, low exposure). The objective is to assess the sensitivity of the diagnosis of COVID-19 by carrying out a nasopharyngeal RT-PCR and a low dose thoracic scanography at the hospital admission of patients scheduled to a procedure under general anesthesia or at risk of aerosolization (surgery, endoscopy, procedures involving risk of interventional radiology) in order to limit the risks of transmission to healthcare professionals or other patients and to rationalize the use of protective equipment. This is an observational research without modification of care in the setting of COVID-19 pandemia. All clinical and biological data will be issued from routine care and medical charts. Routine use of CT scan and nasal swabs is an institutional approved strategy. Serologic tests will be performed as soon as available from serum collection collected after routine blood analysis. All data will be anonymously recorded after information and non-opposition of the patient.