Clinical Characteristics of Labyrinthine Concussion
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초록
Background and Objectives: Inner ear symptoms like hearing loss, dizziness or tinnitus are often developed after head trauma, even in cases without inner ear destruction. This is also known as labyrinthine concussion. The purpose of this study is to determine the clinical manifestations, characteristics of audiometry and prognostic factors of these patients. Materials and Methods: We reviewed the medical records of the 40 patients that had been diagnosed as labyrinthine concussion from 1996 to 2007. We studied the hearing levels in each frequency and classified them according to type and degree of hearing loss. Rates of hearing improvement were evaluated according to age, sex, hearing loss type, degree and presence of dizziness or tinnitus. To find out any correlation between hearing improvement and these factors, we used χ2 test or Fisher’s exact test. Results: Bilateral hearing loss was observed in 22 patients, and unilateral hearing loss in 18 patients. There were 4 (6.5%) ascending, 34 (54.8%) descending, 24 (38.7%) flat type hearing loss, which indicated hearing loss was greater in high frequencies than low frequencies. Among 62 affected ears, 20 (32.3%) gained improvement, and it was achieved mainly in low frequencies. There were only 2 ears with dizziness in 20 improved ears and among 20 dizziness accompanied ears, also only 2 ears were improved. Conclusions: High frequencies are more vulnerable to trauma than low frequencies. The hearing gain is obtained mainly in low frequencies, and association with dizziness serves poor prognosis.
Abstract
Background and Objectives: Inner ear symptoms like hearing loss, dizziness or tinnitus are often developed after head trauma, even in cases without inner ear destruction. This is also known as labyrinthine concussion. The purpose of this study is to determine the clinical manifestations, characteristics of audiometry and prognostic factors of these patients. Materials and Methods: We reviewed the medical records of the 40 patients that had been diagnosed as labyrinthine concussion from 1996 to 2007. We studied the hearing levels in each frequency and classified them according to type and degree of hearing loss. Rates of hearing improvement were evaluated according to age, sex, hearing loss type, degree and presence of dizziness or tinnitus. To find out any correlation between hearing improvement and these factors, we used χ2 test or Fisher’s exact test. Results: Bilateral hearing loss was observed in 22 patients, and unilateral hearing loss in 18 patients. There were 4 (6.5%) ascending, 34 (54.8%) descending, 24 (38.7%) flat type hearing loss, which indicated hearing loss was greater in high frequencies than low frequencies. Among 62 affected ears, 20 (32.3%) gained improvement, and it was achieved mainly in low frequencies. There were only 2 ears with dizziness in 20 improved ears and among 20 dizziness accompanied ears, also only 2 ears were improved. Conclusions: High frequencies are more vulnerable to trauma than low frequencies. The hearing gain is obtained mainly in low frequencies, and association with dizziness serves poor prognosis.
참고문헌 (13)
- Fitzgerald DC, "Head trauma : hearing loss and dizziness", J Trauma, 40, pp.488~496 (1996)
- Grove WE, "Skull fractures involving the ear. A clinical study of 211 cases", Laryngoscope, 49, pp.678~707 (1939)
- Canalis RF, "The ear: comprehensive otology", pp.795~796 (1999), Lippincott Williams & Wilkins
- Ulug T, "Contralateral labyrinthine concussion in temporal bone fractures", J Otolaryngol, 35, pp.380~383 (2006)
- Brunner H, "Disturbances of the function of the ear after concussion of brain", Laryngoscope, 50, pp.921~949 (1940)
- Schuknecht HF, "Deafness and vertigo from head injury", AMA Arch Otolaryngol, 63, pp.513~528 (1956)
- Kochhar LK, "Hearing loss after head injury", Ear Nose Throat J, 69, pp.537~542 (1990)
- Bergemalm PO, "Progressive hearing loss after closed head injury: a predictable outcome?", Acta Otolaryngol, 123, pp.836~845 (2003)
- Ventry IM, "Evaluation of pure tone audiogram configurations used in identifying adults with functional hearing loss", J Aud Res, 5, pp.212~218 (1965)
- Siegel LG, "The treatment of idiopathic sudden sensorineural hearing loss", Otolaryngol Clin North Am, 8, pp.467~473 (1975)
- Schuknecht HF, "An experimental study of auditory damage following blows to the head", Ann Otol Rhinol Laryngol, 60, pp.273~289 (1951)
- Bertholon P, "Combined horizontal and posterior canal benign paroxysmal positional vertigo in three patients with head trauma", Ann Otol Rhinol Laryngol, 114, pp.105~110 (2005)
- Motin M, "Benign paroxysmal positional vertigo as the cause of dizziness in patients after severe traumatic brain injury : diagnosis and treatment", Brain Inj, 19, pp.693~697 (2005)