Orbital Floor Fracture Inferior Rectus Entrapment

Inferior floor medial wall lamina papyracea superior roof lateral wall.

Orbital floor fracture inferior rectus entrapment. Twenty one cases 47 had radiologic evaluations of orbital ct scans that included commentary on possible entrapment. 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. The most common muscle to be entrapped by the fracture is the inferior rectus muscle. Rhee js kilde j yoganadan n pintar f.

Blowout fracture of the orbital floor with entrapment caused by isolated trauma to the orbital rim. Fracture of the orbital floor also known as a blow out fracture can result in entrapment of the inferior rectus muscle limiting upward gaze. However we present a unique case of an inferior rectus muscle entrapment in a medial orbital wall fracture. Entrapment requires urgent freeing of the muscle to prevent necrosis of the incarcerated muscle.

Orbital fractures are typically caused by blunt periocular trauma and are one of the most common types of facial fractures. 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. Entrapment of eye muscle especially in children the inferior rectus muscle is the most common ocular muscle to become entrapped with an orbital floor fracture trap door phenomenon and this may not be visible on conventional x rays. The most common entrapment is that of the inferior rectus muscle in a fractured floor.

3 the intermuscular septum may also be entrapped resulting in restriction. Fractures of the orbital floor are common. Intraoperatively 16 76 of these patients had the inferior rectus muscle incarcerated in the fracture while 5 24 patients had incarceration of the orbital fat. Intervention within days for some orbital floor fractures.

Orbital floor fractures often result from blunt trauma to the orbit. Ophthal plast reconstr surg. Head and neck trauma exam with special attention to. Blowout fractures can occur through one or more of the orbital walls.

It is estimated that about 10 of all facial fractures are isolated orbital wall fractures the majority of these being the orbital floor and that 30 40 of. 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. They can be repaired without an implant in some.