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Corrective Hyaluronic Acid Fillers and Combination Cosmetic Treatments for Facial Cutaneous Defects Due to Autoimmune Connective Tissue Diseases: A Retrospective Review

accuracy of clogged or obstructed blood flow. It could be helpful to identify injured vessels in vascular adverse events of filler injection throughmeasurement of the diameter and pressure of vessels. Also, it is possible to check up the site and quantity of the injected filler materials and blood flow of injured vessels during treatment and follow-up period using color Doppler ultrasonography. In this case, hyaluronidase was directly injected into the pocket of HA under ultrasound guidance; it resulted in a successful treatment outcome. However, because few clinics performing cosmetic procedure have ultrasound devices, if early signs of impending necrosis are observed, blind injection of hyaluronidase into the lesion as soon as possible can induce better clinical prognosis than looking for the location where the ultrasound is available.