|
KMID : 0361020010440030251
|
|
Korean Journal of Otolaryngology - Head and Neck Surgery
2001 Volume.44 No. 3 p.251 ~ p.255
|
|
|
Influence of middle ear conditions on measurement of evoked otoacoustic emissions
|
|
박형진/Hyoung Jin Park
고의경/이현순/장형준/백무진/윤종근/전경명/Eui Kyung Goh/Hyun Sun Lee/Hyung Jun Jang/Moo Jin Baek/Jong Keun Yoon/Kyong Myong Chon
|
|
|
Abstract
|
|
|
Background and Objectives : Otoacoustic emissions(OAEs) are low level acoustic sounds of cochlear origin. They have several advantages over other methods in auditory testing, particularly in children. However, because of the crucial dependence of
emission levels on the healthiness of the middle ear conduction system, some middle ear problems confound the interpretation of evoked OAEs(EOAEs). The purpose of this study is to evaluate the effects of middle ear condition(tympanometry) on
DPOAEs
and
TEOAEs in normal hearers. Materials and Method : Tympanometry, TEOAEs and DPOAEs were measured in 42 subjects(68 ears) who were under 12 years old and have pure tone thresholds within 25 dB HL Results : The OAEs pass rates for the three groups
were as
follows: 95 % for TEOAEs and 90 % for DPOAEs in the tympanogram type A group; 12 % for TEOAEs and 12 % for DPOAEs in the tympanogram type B group; 27.3 % for TEOAEs and 13.6 % for DPOAEs in the tympanogram type C group. The pass rate and
sensitivity of
EOAEs were much higher in the type A group than in the type B and C groups. Conclusion : OAEs are useful for screening the integrity of outer hair cells in the tympanogram type A group but not in the type B and C groups. Therefore, tympanometry
that
represents middle ear condition is recommended before the OAE test. In addition, if TEOAEs and DPOAEs are simultaneously performed, sensitivity will be increased.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|