Lung Ultrasound and Sonographic Subpleural Consolidation in COVID-19 Pneumonia Correlate with Disease Severity.

INTRODUCTION: One of the ultrasonic features of COVID-19 pneumonia is the presence of subpleural consolidation (SPC), and the number of SPCs varies among patients with COVID-19 pneumonia. AIM: To examine the relationship between disease severity and the number of SPCs on admission. Methodology. This observational, prospective, single-center study included patients with suspected COVID-19 infection who had been transferred to the ICU. A specialized intensivist in critical care ultrasound performed lung ultrasound (LUS) and echocardiography within 12 hours of a patient's admission to the ICU. The aeration score was calculated, and the total number of SPCs was quantified in 12 zones of the LUS. RESULTS: Of 109 patients with suspected COVID-19 pneumonia, 77 (71%) were confirmed. The median patient age was 53 (82-36) years, and 81 of the patients (73.7%) were men. The aeration score and the counts of subpleural consolidation in each zone were significantly higher in patients with COVID-19 pneumonia (P=0.018 and P < 0.0001, respectively). There was an inverse relationship between PO2/FiO2, the aeration score, and the number of subpleural consolidations. The higher the number of SPCs, the worse the PO2/FiO2 will be. CONCLUSIONS: Sonographic SPC counts correlate well with the severity of COVID-19 pneumonia and PO2/FiO2. The number of SPCs should be considered when using LUS to assess disease severity.

Appropriateness of lung ultrasound for the diagnosis of COVID-19 pneumonia.

BACKGROUND: Chest radiography (CXR) and computerized tomography (CT) are the standard methods for lung imaging in diagnosing COVID-19 pneumonia in the intensive care unit (ICU), despite their limitations. This study aimed to assess the performance of bedside lung ultrasound examination by a critical care physician for the diagnosis of COVID-19 pneumonia during acute admission to the ICU. METHOD: This was an observational, prospective, single-center study conducted in the intensive care unit of Adan General Hospital from April 10, 2020, to May 26, 2020. The study included adults with suspicion of COVID-19 Infection who were transferred to the ICU. Patients were admitted to the ICU directly from the ED after reverse transcriptase-polymerase chain reaction (RT-PCR) swabs were sent to the central virology laboratory in Kuwait, and the results were released 16 to 24 hours after the time of admission. A certified intensivist in critical care ultrasound performed the lung ultrasound within 12 hours of the patient's admission to the ICU.The treating physician confirmed the diagnosis of COVID-19 pneumonia based on a set of clinical features, inflammatory markers, biochemical profile studies, RT-PCR test results, and CXR. RESULTS: Of 77 patients with suspected COVID-19 pneumonia, 65 (84.4%) were confirmed. The median age of the patients was 48 (31-68) years, and 51 (71%) were men.In the group of patients with confirmed COVID-19 pneumonia, LUS revealed four signs suggestive of COVID-19 pneumonia in 63 patients (96.9%) (sensitivity 96.9%, CI 85%-99.5%). Two patients presented with unilateral lobar pneumonia without other ultrasonic signs of COVID-19 pneumonia but with positive RT-PCR results. Among patients in the group without COVID-19 pneumonia who had negative RT-PCR results, 11 (91.7%) were LUS negative for COVID-19 pneumonia (specificity 91.7%, 95% CI 58.72%-99.77%). CONCLUSIONS: During the COVID-19 outbreak, LUS allows the identification of early signs of interstitial pneumonia. LUS patterns that show a combination of the four major signs offer high sensitivity and specificity compared to nasopharyngeal RT-PCR.

Point-of-Care Ultrasound for COVID-19 Pneumonia Patients in the ICU.

BACKGROUND: There is scarce literature on point-of-care ultrasound (POCUS) assessment characteristics in coronavirus disease 2019 (COVID-19) pneumonia with hypoxic respiratory failure. METHODS: This study was an observational, prospective, single-center study, including adults suspected to have COVID-19 who were transferred to the intensive care unit (ICU). An intensivist in critical care ultrasound performed lung ultrasound (LUS) and echocardiology within 12 hours of patients' admission to the ICU. We calculated the trans mitral E/A ratio, E/e', left ventricular ejection fraction (EF), inferior vena cava (IVC) diameter, right ventricle (RV) size and systolic function. RESULTS: In the group of patients with confirmed COVID-19 pneumonia, echocardiographic findings revealed normal E/e', deceleration time (DT), and transmittal E/A ratio compared to those in the non-COVID-19 patients (p = 0.001, 0.0001, and 0.0001, respectively). IVC diameter was < 2 cm with > 50% collapsibility in 62 (81%) patients with COVID-19 pneumonia; a diameter of > 2 cm and < 50% collapsibility was detected among those with non-COVID-19 pneumonia (p-value of 0.001). In patients with COVID-19 pneumonia, there were 3 cases of myocarditis (3.9%) with poor EF, severe RV systolic dysfunction was seen in 9 cases (11.6%), and 3 cases exhibited RV thrombus. Lung US revealed 4 signs suggestive of COVID-19 pneumonia in 77 patients (98.6%) (sensitivity 96.9%; confidence interval, 85%-99.5%) when compared with reverse transcriptase-polymerase chain reaction results. CONCLUSIONS: POCUS plays an important role in the bedside diagnosis, hemodynamic assessment and management of patients with acute hypoxic respiratory and circulatory failure with COVID-19 pneumonia.