Correlation of Lung Ultrasonography With Chest CT Findings in Cancer Patients With COVID-19 Viral Pneumonia

Summary

Thoracic imaging, either with chest X-ray (CXR) or computed tomography (CT), is an essential part of the diagnosis of coronavirus disease-19 (COVID-19) in patients admitted to hospital with fever or respiratory symptoms.

Inspite of the results of PCR tests are the gold standard, the sensitivity of CT for diagnosing COVID-19 is 97%. The specific epidemic contingency makes CT an accurate tool to stratify patients based on imaging patterns, predicting poor outcomes and the need for ventilation.

Lung ultrasound (LUS) is widely used in emergency departments because it is broadly available, low-cost, and has a high accuracy for diagnosing pulmonary diseases.

Despite the diagnostic power of LUS and its influence on decision-making and therapeutic management, there are still significant barriers to the widespread use of this tool.

The advantages of LUS are more obvious in older patients with multimorbidity and restricted mobility, for whom high-quality CXR and CT scans are difficult to obtain. In the hands of experienced clinicians, LUS diagnostic accuracy for bacterial pneumonia is similar to chest CT.

However, a correlation between LUS and CT findings in patient urgently hospitalized for severe COVID-19 pneumonia remains to be determined.

COVID-19 leads to an aggressive inflammatory response that is actually the reaction of the immune system. Some patients exhibit pneumonia in both lungs, multi-organ failure, and even death. Individuals who have severe health conditions, like cancer, cardiovascular diseases, diabetes, and pulmonary diseases, are at higher risk of COVID-19 infection.

Also, this dysregulated immune response resulting in excessive production of inflammatory cytokines and chemokines (as IL-1ra, IL-6, IP-10, G-CSF, MCP-1, MIP-1α and TNF) causes the development of cytokine release syndrome (CRS) which is considered as pathologic underpinning for disease progression and lead to severe collateral tissue damage.

IL-6 may serve as a predictive biomarker for disease severity as its elevated levels were reported in several studies of COVID-19 infection. Also IL-6 levels were correlated with mortality in COVID-19 patients. IL-6 blockade is a promising strategy for COVID-induced CRS.

In particular, clinical epidemiological studies are needed to determine if IL-6 and/or other inflammatory cytokine levels predict subsequent development and persistence of long COVID 19 viral pneumonia.

Conditions

• Cancer Patients

Interventions

RADIATION

lung ultrasonography versus CT

chest CT will be done before admission and LUS within first 24 h from admission into the quarantine sector. In addition to 2 weeks after admission. CT images will be reviewed by chest radiologist expert, who will calculate a CT severity score based on extension and distribution of GGOs and consolidations. All CT scans will be performed in supine position at end inspiration without intravenous administration of contrast media. Within 24 h from admission and CT scanning, bedside LUS will be performed by clinician who will be blind to chest CT findings. Examinations will be performed with the patient in the sitting position, systematically scanning the front and the back side of each hemithorax. Blood sample will be collected into 4 mL Vacuette containing EDTA. Samples will be stored on ice, processed within 30 min and plasma will be isolated by centrifugation at 2000g for 20 min at 4 °C. Plasma will be immediately frozen at - 80 °C in several aliquots.

Sponsors & Collaborators

• South Egypt Cancer Institute

  lead OTHER

Eligibility

Min Age

16 Years

Max Age

60 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2022-03-30

Primary Completion

2025-06-30

Completion

2025-11-28

Countries

• Egypt

Study Locations