Microvascular Insights Into Hyaluronic Acid Filler Dispersal Within an Artificial Model of Arterial Embolism

HA fillers behave as deformable embolic particles that disperse distally under physiologic microtubular conditions. These findings support a concurrent microembolic mechanism underlying filler-induced ischemia. Product rheology, cannula gauge, and vascular anatomy are important determinants of embolic particle behavior.