It seems like this would be easy to do when moving the needle constantly and "feathering".
Why is It Rare to Inject into a Blood Vessel with Filler?
Doctor Answers 1
Filler injection into a vessel
Injecting filler into a vessel is thankfully very rare. Fanning it out may limit exposure of the product into the vessels. Sometimes local used can cause the vessels to shrink as well making it more difficult to occur.
Have a question? Ask a doctor