Correlation between arterial blood gas and CT volumetry in patients with SARS-CoV-2 in the emergency department

Chest CT imaging features of COVID-19 and its correlation with the PaO2/FiO2 ratio: a multicenter study in Upper Egypt

“…A moderate negative correlation was observed between the PaO 2 /FiO 2 ratio and the CT total severity score, r = − 0.42, p < 0.001, indicating that pulmonary function decreased causing oxygenation impairment as the total severity score increased. This agrees with the results of Turcano et al [ 6 ] who reported that a higher percentage of the lung being involved in the inflammatory process correlated with decreased oxygenation capacity which explained the difficulty of oxygenating the blood, even with high FiO 2 values. Shang et al [ 5 ] also recorded that the total CT score had a moderate correlation with arterial blood gas indices.…”

“…His PaO 2 /FiO 2 ratio was 350 mmHg. Axial thinsection unenhanced CT image shows bilateral upper lobe vascular enlargement within surrounding dense ground-glass opacities with interstitial thickening results of Turcano et al [6] who reported that a higher percentage of the lung being involved in the inflammatory process correlated with decreased oxygenation capacity which explained the difficulty of oxygenating the blood, even with high FiO 2 values. Shang et al [5] also recorded that the total CT score had a moderate correlation with arterial blood gas indices.…”

“…Because CT cannot be performed for all suspected patients, another rapid, inexpensive, and widely available test is needed for the preliminary assessment of patients. Several studies have shown correlation between ABG values and the extent of pulmonary lesions on CT [ 5 , 6 ]. Furthermore, COVID-19 can be complicated by acute respiratory distress syndrome (ARDS) [ 11 ].…”

“…However, the overuse of CT on suspected patients can lead to unnecessary radiological exposure and consumption of much needed radiological resources. Several studies have suggested that arterial blood gas values correlate with the extent and morphological characteristics of CT lesions [5,6]. Therefore, the current study aimed to evaluate the clinical and chest CT imaging features of COVID-19 in Egyptian patients and assess the correlation between the extent of chest CT lesions calculated by the total severity score and the arterial oxygen partial pressure/fraction of inspired oxygen (PaO 2 /FIO 2 ) ratio to determine its value for preliminary assessment of disease severity.…”

Correlating arterial blood gas, acid–base and blood pressure abnormalities with outcomes in COVID-19 intensive care patients

“…However, the majority of these studies have focused on biochemical and haematological laboratory parameters with very little data available on ABG analysis. 18–20 Also, there is a paucity of data on the effects of SARS-CoV-2 on ACE2 and aldosterone and the ensuing acid–base abnormalities. We therefore aimed to investigate ABG results, specifically acid–base findings, along with electrolytes, renal function tests and the possible effects of RAS upregulation on blood pressure (BP) and electrolytes of COVID-19 patients admitted to a dedicated ICU.…”