Sonographic findings of COVID‐Arm: A case series

The following cut-off values were used to determine negative Doppler: isolated vessels in the dermis and hypodermis, with a systolic peak of 0.7 MHz, and vessel diameter >1 mm. The variables analysed in mode B of the HFUS considered to be indicative of inflammation were hypoechogenicity of the dermis, hyperechogenicity of lobes in all cases with or without hypoechogenicity and thickening of the subcutaneous septa. Table 1 Clinical and high-frequency ultrasound characteristics of patients Case Age Medical history Dose Day of onset Duration Systemic symptoms Treatment US findings 1 37 Depression 2nd (selfreported also for 1st dose) 1 10 Fever Topical corticosteroids—oral antihistamines Hypoechoic dermis. [...]HFUS permits assessment of response to treatment during follow-up. ACKNOWLEDGEMENTS We thank the Pharmacovigilance and Occupational Health departments and technical committee of the Hospital Clinic of Barcelona for their generous contributions.