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Clinical study of traumatic ossicular disruption without tympanic membrane perforation

Other Title
고막 천공이 없는 외상성 이소골 탈구의 임상적 고찰
최, 재영; 김, 시찬; 윤, 현철; 박, 기현; 이, 원상
Taehan Ibi Inhukwa Hakhoe chi, 44(7):696-699, 2001
Journal Title
Taehan Ibi Inhukwa Hakhoe chi; Journal of the Korean Otolaryngological Society; 대한이비인후과학회지
Background and Objectives :Ossicular disruptions following trauma can occur without perforation of the tympanic membrane. It is difficult to confirm the presence of ossicular disruption in such cases. We have reviewed the clinical characteristics


patients with traumatic ossicular disruption with an intact tympanic membrane, and purposed a new diagnostic flow chart that utilizes three-dimensional CT scanning. Materials & Methods: Twenty patients who had ossicular disruption with an intact

tympanic membrane that was confirmed by exploro-tympanotomy were studied. In two cases where the ossicular chain appeared intact on conventional temporal bone CT, a three-dimensional CT scan was performed. Results: Concomitant temporal bone

fracture was

not found in 60% of the patients, and only eleven patients showed an Ad-type tympanogram. The most common site of disruption on preoperative temporal bone CT scans was the

incudostapedial joint, but exploro-tympanotomy revealed that dislocation

of the incus was the most common. The temporal bone CT scans of five

patients appeared normal, but the three-dimensional CT scan performed

on two of these patients exhibited evidences of ossicular disruption.

Conclusion: The diagnosis of ossicular disruption with an intact

tympanic membrane can be made through a history of head trauma,

audiologic studies(pure tone audiometry, impedance audiometry), and

temporal bone CT scans. However, diagnosis may occasionally be difficult

with these modalities, and three-dimensional CT scanning can be helpful

in such cases.
이소골 탈구정상 고막3차원 전산화 단층촬영술Ossicular disruptionIntact tympanic membraneThree-dimensional CT scan
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Journal Papers > School of Medicine / Graduate School of Medicine > Otolaryngology
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