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Keywords:
Trauma, Diagnostic procedure, CT, Head and neck, Emergency, Ear / Nose / Throat
Authors:
A. Venkatasamy1, F. Veillon2, B. Rock1, S. Riehm1, P. Meriot3, P. Baur1, A. Charpiot1; 1Strasbourg/FR, 2Strasbourg Cedex/FR, 3Brest/FR
DOI:
10.1594/ecr2016/C-0657
Methods and materials
We analyzed a series of 712 patients presenting fractures of the temporal bone.
In an emergency context,
the patients symptoms were otorrhagia,
peripheral facial palsy,
otorrhea and in fewer cases pulsatile exophtalmia.
Later after the trauma,
the patients suffered from hearing loss,
vertigo,
tinnitus,
otorrhea,
peripheral facial palsy,
rhinorrhea and rarely meningitis.
All of the 712 patients in our study underwent a non-contrast CT of the temporal bone.
The study box was placed parallel to the orbital roof thus reducing the irradiation to the lens.
Slice thickness ranged from 0.4 to 0.5mm and the reconstruction increment was 0.1-0.2mm.
Axial reconstructions were parallel to the semicircular canal.
Sagittal,
coronal,
stapes oblique and incus reconstructions were also performed.
The image reading was done by cavities: external,
middle and inner ears.
The previously called « extralabyrinthine » fractures were now considered as external and/or middle ear fractures,
with their respecting walls (anterior,
posterior and superior for the external ear ; anterior,
external and internal walls for the middle ear),
while the « labyrinthine » ones were described as inner ear fracture.
The problem of the extralabyrinthine fractures was not the orientation of the traumatic wave,
but the orientation of the middle ear is always followed by the fracture.