injuries poisoning
How To Do an Infraorbital Nerve Block, Percutaneous
Relevant Anatomy
The infraorbital nerve is a termination of the maxillary nerve, which is the 2nd branch of the trigeminal nerve. The infraorbital nerve exits the cranium through the infraorbital foramen, which is palpable 1 cm below the inferior border of the infraorbital ridge, directly below the pupil when the patient is looking straight ahead. Several cutaneous branches of the infraorbital nerve spread over the ipsilateral midface, lower lid, side of the nose, and upper lip. Thus, an infraorbital block anesthetizes the ipsilateral lower eyelid, upper cheek, side of the nose, and upper lip. 