Association between preoperative inferior rectus muscle swelling and outcomes in orbital blowout fracture.
OBJECTIVE
In 18 patients with orbital blowout fracture who underwent reconstruction using a bone autograft, the association between preoperative inferior rectus muscle swelling and the outcome 1 year after the operation was evaluated.


METHODS
The patients were classified according to outcomes into four groups: Group A without double vision showing normal ocular movements, Group B with double vision showing normal ocular movements, Group C with double vision showing improvement in ocular movements, and Group D with double vision showing no improvement in ocular movements. Inferior rectus muscle swelling was evaluated by calculating its swelling rate on the injured compared with the non-injured side on preoperative coronal CT images.


RESULTS
Concerning outcomes, 12, 2, and 4 patients were classified as Groups A, B, and C, respectively, and no patient was classified as Group D. The inferior rectus muscle swelling rate was ≤1.2 in Group A, and 1.6-2.4 in Groups B and C.


CONCLUSIONS
In patients in whom inferior rectus muscle swelling on the injured is ≥1.6 times that on the non-injured side on preoperative coronal CT images, double vision and slight impairment of eye movements may remain after surgery.
Department of Plastic and Reconstructive Surgery, Kinki University School of Medicine, Japan.
Kazuhide
K
Matsunaga
Shinichi
S
Asamura
Tadaaki
T
Morotomi
Mitsuhiro
M
Wada
Yoshitaka
Y
Wada
Norifumi
N
Nakamura
Noritaka
N
Isogai
D000293:Adolescent; D000328:Adult; D000368:Aged; D016025:Bone Transplantation; D004172:Diplopia / Q000209:etiology; D004487:Edema; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009801:Oculomotor Muscles / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology* / Q000601:surgery; D061220:Oculomotor Nerve Injuries / Q000209:etiology*; D009917:Orbital Fractures / Q000150:complications* / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology*; D057234:Preoperative Period; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D055815:Young Adult