What is a key principle to prevent hematoma during injections?

• A. Inject rapidly and with large volumes
• B. Use proper technique, slow injection, and aspirate
• C. Inject intravascularly to test flow
• D. Massage the area after injection

Answer: (B)

Preventing a hematoma during injections comes down to minimizing vascular injury through controlled technique. Using proper technique means stable needle control, the correct penetration depth and angle for the chosen site, and avoiding unnecessary needle passes. Injecting slowly reduces tissue disruption and the pressure that can cause small vessels to rupture. Aspiration before depositing the anesthetic helps confirm the needle isn’t in a blood vessel, so you won’t inject directly into the vasculature and provoke a hematoma. Rapid injections, testing flow intravascularly, or massaging the area after injection aren’t protective and can increase risk or cause other issues.