Orbital Floor Fracture Inferior Rectus Entrapment

For example a fracture might be described as a pure inferior blowout fracture with likely entrapment of the inferior rectus muscle resulting in severely limited up gaze.

Orbital floor fracture inferior rectus entrapment. Blowout fracture of the orbital floor with entrapment caused by isolated trauma to the orbital rim. Intervention within days for some orbital floor fractures. The most common muscle to be entrapped by the fracture is the inferior rectus muscle. Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle.

A blowout fracture of the orbital floor is defined as a fracture of the orbital floor in which the inferior orbital rim is intact. Orbital fractures are typically caused by blunt periocular trauma and are one of the most common types of facial fractures. Head and neck trauma exam with special attention to. Rhee js kilde j yoganadan n pintar f.

In children they tend to be of the trapdoor type which can cause inferior rectus entrapment presenting clinically with limitation of upgaze nausea bradycardia and positive forced ductions. Inferior blowout fractures are the most common. 3 the intermuscular septum may also be entrapped resulting in restriction. Fractures of the orbital floor are common.

Fracture of the orbital floor also known as a blow out fracture can result in entrapment of the inferior rectus muscle limiting upward gaze. Orbital floor fractures often result from blunt trauma to the orbit. Ophthal plast reconstr surg. However we present a unique case of an inferior rectus muscle entrapment in a medial orbital wall fracture.

Lateral to the orbital canal lies the superior orbital fissure housing cranial nerves iii iv v and vi. Orbital floor fractures were investigated and described by mackenzie in paris in 1844 and the term blow out fracture was coined in 1957 by smith regan who were investigating injuries to the orbit and resultant inferior rectus entrapment by placing a hurling ball on cadaverous orbits and striking it with a mallet. Inferior floor medial wall lamina papyracea superior roof lateral wall. The most common entrapment is that of the inferior rectus muscle in a fractured floor.