Table 2.

COVID-19 comprehensive POCUS protocols.

First Author, Year of Publication (Ref.)	Article Type	Setting	POCUS Protocols
Koratala A, 2020 [90]	Editorial	Critically ill Patients with COVID-19	Tri-POCUS approach: Lungs → B-line numbers and distribution, pleural line abnormalities, consolidations, pleural effusion Heart → pericardial effusion, LV EF, RV relative size, passive leg raise and stroke volume assessment, inferior vena cava collapsibility Venous system
Anile A, 2020 [81]	Commentary	Critically ill Patients with COVID-19	COVID-US approach: C: cardiac evaluation O: outputs → renal resistive index, velocity-time integral V: ventilation → B-line patterns, hyperinflation and recruitment response, lung score, pneumothorax/effusion. I: intubation → prediction of difficult laryngoscopy/intubation, endotracheal intubation confirmation D: Doppler and deep venous thromboembolism/pulmonary embolism
Coneybeare, 2021 [101]	Review	Patients under investigation for COVID-19	COVUS approach: Cardiac US → parasternal long, parasternal short, apical 4-chamber, subxiphoid, and inferior vena cava Lung US → Bilateral anterior, bilateral axillary, and bilateral posterior (lawnmower technique for assessment)
Toraskar K, 2022 [102]	Cross-sectional study	Critically ill Patients with COVID-19	Lung US → BLUE protocol [103] Cardiac US → FATE protocol [104] Lower limb deep vein US: two-point compression sonography method

US: ultrasound; LV: left ventricle; RV: right ventricle, EF: ejection fraction.