Alice Lee’s research while affiliated with Donald & Barbara Zucker School of Medicine at Hofstra/Northwell and other places

... When the solution is injected through the catheter, a small mass of polymeric gel forms that adheres to the tip and swells when more solution is administered. It solidifies completely within 5 min after injection and forms a spongy gel that traps tantalum powder [36]. A film forms at the solution-blood interface as the material precipitates, forming a bag full of solution that is further expanded by the growing mass of fresh solution exiting the catheter tip [37]. ...

Reference:

OnyxTMGel or Coil versus Hydrogel as Embolic Agents in Endovascular Applications: Review of the Literature and Case Series