Which injection has the second highest rate of hematoma formation?

Which injection has the second highest rate of hematoma formation?

• A. Inferior alveolar nerve block
• B. PSA block
• C. Infraorbital block
• D. Mental block

Answer: (A)

Hematoma formation happens whenever a blood vessel is injured by the needle during an injection. The level of risk depends on how vascular the target area is and how close the needle path is to large vessels. The posterior superior alveolar (PSA) block sits in a highly vascular region near the pterygoid venous plexus and the posterior superior alveolar vessels, so it has a high risk of causing a hematoma. The inferior alveolar nerve block also passes through a region with substantial vascular flow—the pterygomandibular space containing the inferior alveolar artery and veins—producing a significant but typically slightly lower risk than the PSA approach. The infraorbital block involves vessels within the infraorbital canal, where injuries can occur but are less common than with PSA or the standard inferior alveolar approach. The mental block targets a smaller, more superficial vascular area near the mental foramen, where bleeding is less likely to form a noticeable hematoma. So, the second highest rate of hematoma formation is associated with the inferior alveolar nerve block. If a hematoma does occur, apply prompt pressure and monitor for swelling or airway concerns.

Hematoma formation happens whenever a blood vessel is injured by the needle during an injection. The level of risk depends on how vascular the target area is and how close the needle path is to large vessels. The posterior superior alveolar (PSA) block sits in a highly vascular region near the pterygoid venous plexus and the posterior superior alveolar vessels, so it has a high risk of causing a hematoma. The inferior alveolar nerve block also passes through a region with substantial vascular flow—the pterygomandibular space containing the inferior alveolar artery and veins—producing a significant but typically slightly lower risk than the PSA approach. The infraorbital block involves vessels within the infraorbital canal, where injuries can occur but are less common than with PSA or the standard inferior alveolar approach. The mental block targets a smaller, more superficial vascular area near the mental foramen, where bleeding is less likely to form a noticeable hematoma.

So, the second highest rate of hematoma formation is associated with the inferior alveolar nerve block. If a hematoma does occur, apply prompt pressure and monitor for swelling or airway concerns.