COVID-19 pandemic has developed worldwide in less than 4 months. While most patients have a mild or uncomplicated disease (80%), approximately 15% need hospital care and 5% intensive care. Severe cases are characterized by pulmonary involvement which may progress to acute respiratory distress syndrome (ARDS). Early identification of patients who are likely to get worse is therefore a major issue. While, chest X-ray has poor diagnostic performances, pulmonary computed tomography (CT scan) seems very sensitive (97%) and quite specific of COVID-19. Sub-pleural bilateral ground-glass pattern can precede the positivity of RT-PCR for SARS-CoV-2. CT scan is now considered as the best imaging test to assess COVID-19 patients and is recommended as first-line diagnosis tool by the French Society of Radiology (SFR). However, performing CT scan in all or many patients with suspected COVID-19 may result in radiology department overload, especially, taking into account bio-cleaning between patients. Moreover, CT scan may lead to adverse effects including induced cancer due to the cumulative diagnostic irradiation. Chest ultrasonography may be an alternative to CT scan. It is a simple, non-invasive, non-irradiating, inexpensive and available at the point of care (POCUS). Most of emergency physicians and many other specialists (pneumologists, infectious disease or intensive care physicians) are trained to perform chest POCUS and use it in their everyday practice. Multiple studies have demonstrated its superiority to chest X-ray for the detection of pneumonia. In ARDS, a scoring has been developed and has shown good correlation with mortality. POCUS is very effective in detecting peripheral patterns and seems appropriate to explore COVID-19 patients. Previous studies suggest its interest in SARSCov2 infections for initial patient assessment and identification of lung damage. However, its performances have never been scientifically evaluated to date. Our main hypothesis is that point of care lung ultrasonography performed during the initial examination may identify high-risk COVID-19 patients.
Patients consulting in the emergeny department of participating centres for suspected or
confirmed COVID-19 are checked for inclusion and non-inclusion criteria and asked for study
participation.
Including patients have point-of-care lung ultrasonography (POCUS) performed within 48 hours
following ED admission. The severity of lung damage is assessed using the lung
ultrasonography score on 36 points for ARDS (POCUS score).
Apart POCUS score assessment, patients are managed as usual.
If a chest CT scan is performed, its result is collected and, in particular, the
quantification of the extent of pulmonary lesions in percentage from 0 to 100%, carried out
according to the recommendations of the French Society of Radiology.
For hospitalized patients, if possible, a second chest ultrasonography is performed on Day 5
+/- 3. The extent of lung damage is assessed by the POCUS score.
A follow-up is carried out on day 14 (D14) and the patient's status according to the "Ordinal
Scale for Clinical Improvement" for COVID-19 from WHO is recorded.
Procedure: Follow-up at 14 days
Point of care chest ultrasonography and 14-day follow-up to assess the evolution of the infection and care requirement (invasive ventilation or death)
Inclusion Criteria:
- Patient with COVID-19 confirmed by positive RT-PCR or considered as probable by the
in-charge physician,
- ≥18 years old,
- Not requiring respiratory assistance and/or other intensive care
- Not subject to a limitation of active therapeutics
Exclusion Criteria:
- History of pneumonectomy
- Any reason making chest ultrasonography impossible
- Any reason making 14-day follow-up impossible
- Patient opposition to research participation.
Florence DUPRIEZ
Bruxelles, Belgium
MORIN François
Angers, France
COUTURAUD Francis
Brest, France
BAUDIN Laure
Cholet, France
TAZAROURTE Karim
Lyon, France
LE CONTE Philippe
Nantes, France
MARJANOVIC Nicolas
Poitiers, France
SOULAT Louis
Rennes, France
JOLY Luc-Marie
Rouen, France
DELOMAS Thomas
Saint-Lô, France
FLAMENT Thomas
Tours, France