Ct Of Orbital Floor Fracture

A blowout fracture of the orbital floor is defined as a fracture of the orbital floor in which the inferior orbital rim is intact.

Ct of orbital floor fracture.

An orbital computed tomography the gold standard in trauma ct with contiguous thin axial and coronal sections should be ordered to confirm the diagnosis and plan for treatment see figure 1a. Getting hit with a baseball or a fist often causes a orbital blowout fracture. This is reflected in the demographics. It is more prevalent in young men.

Three dimensional ct reconstruction helps define facial bone anatomy and fractures clearly. Left orbital floor fracture is depressed by 3 5 millimeters. Orbital floor fracture also known as blowout fracture of the orbit. Left orbital floor fracture.

The floor is likely to collapse because the bones of the roof and lateral walls are robust. Different types of orbital fractures can occur since the rim of the socket is made of fairly thick bones while the floor and nasal side of the socket is paper thin in many places. Hemorrhage partially fills the left maxillary sinus. This fracture can also affect the muscles and nerves around the eye keeping it from moving properly and feeling normal.

Large fractures involving at least half of the orbital floor particularly when associated with large medial wall fractures determined by ct. This is when a blow or trauma to the orbital rim pushes the bones back causing the bones of the eye socket floor buckle to downward. Orbital fractures of this size have a high incidence of subsequent significant enophthalmos. With blow out fractures of the orbital floor ct scanning can directly depict the degree of enophthalmos if any.

1 0 1 5mm axial ct scans of the orbit with coronal reconstruction. An orbital blowout fracture is a traumatic deformity of the orbital floor or medial wall typically resulting from impact of a blunt object larger than the orbital aperture or eye socket most commonly the inferior orbital wall i e. Thin cut coronal reconstructions are actually preferred to. The blowout fracture is the most common type of orbital fracture and is usually the result of trauma.

No evidence of rectus muscle entrapment retrobulbar hemorrhage or proptosis. These fractures occur in the bony outer edges of the eye socket. There are three main types of orbital fractures that we see. Bilateral frontal intraparenchymal hemorrhages.

Orbital blowout fractures are usually the result of a direct blow to the orbit which causes a sudden increase in intraorbital pressure. Orbital floor fractures may result when a blunt object which is of equal or greater diameter than the orbital aperture strikes the eye or on the cheek 1.