Venous Doppler ultrasound in critically Ill COVID-19 patients: game changer in anticoagulation therapy.

Background: COVID-19 infection has been associated with a high rate of thrombotic events, such as deep vein thrombosis (DVT) and acute pulmonary embolism (APE).

Methods: The purpose of our retrospective study was to evaluate the prevalence of asymptomatic DVT in lower limbs in critically ill COVID-19 patients (n = 23) with severe respiratory failure and high levels of D-dimer by bedside Doppler ultrasound (DU).

Results: DVT was diagnosed in 14 cases (60.

Normal values of liver shear wave velocity in healthy children assessed by acoustic radiation force impulse imaging using a convex probe and a linear probe.

Acoustic radiation force impulse (ARFI) is an image-guided ultrasound elastography method that allows quantification of liver stiffness by measurement of shear wave velocity. One purpose of the work described in this article was to determine the normal liver stiffness values of healthy children using ARFI with two different probes, 4 C1 and 9 L4. Another purpose was to evaluate the effects of site of measurement, age, gender and body mass index on liver stiffness values.

Contrast-enhanced ultrasound of liver lesions related to arterial thrombosis in adult liver transplantation.

Purpose: To describe the contrast-enhanced ultrasound (CEUS) features of liver and biliary lesions related to hepatic artery thrombosis in adult patients with orthotopic liver transplantation.

Methods: Gray-scale ultrasound (US), Doppler US, and CEUS using a hexafluoride-based US contrast media were performed on a series of eight patients with liver transplantation and hepatic artery thrombosis.

Results: Six of the cases presented infarctions, seen as parenchymal geographic areas of lack of enhancement.