[Study on the characters of wideband tympanometry in newborns with normal hearing].
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
; 32(4): 244-249, 2018 Feb.
Article
in Zh
| MEDLINE
| ID: mdl-29798498
ABSTRACT
Objective:
The aim of this study is to establish the characteristic of wideband tympanometry (WBT) in neonates with normal hearing.Method:
Ninety newborn babies (149 ears) who had received rooming in care and passed hearing screening were randomly selected to test WBT. The screening programme consisted of distortion product otoacoustic emissions (DPOAE) and tympanometry at 1 kHz. The eigenvalue of ear canal volume, middle ear resonance frequency and acoustic absorptivity were obtained initially to explore the influence of gender and mode of delivery on the eigenvalues.Result:
â Ear canal volume The ear canal volume varied within (0.50±0.12)ml. The statistically significant correlationwas observed between ear canal volume and gender as well as the way of delivery (P<0.01). â¡Resonance frequency the resonant frequency distributed from 128 Hz to 642 Hz (mean 328.2±125.76 Hz). No statistically significant correlation (P>0.05) was observed between resonance frequency and gender as well as the way of delivery. â¢Frequency wideband absorbance function the shape of the curve showed two peaks and two troughs. The three most values were located in 1 296 Hz, 2 000 Hz and 5 339 Hz. No statistically significant correlation (P>0.05) was observed between acoustic absorptivity and gender as well as way of delivery.Conclusion:
Resonance frequency and frequency acoustic absorptivity functions of newborns are different from adults. It is necessary to establish the normal reference value of WBT for newborns in China in order to promote this technique in the clinic.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Acoustic Impedance Tests
/
Neonatal Screening
/
Otoacoustic Emissions, Spontaneous
Limits:
Humans
/
Newborn
Country/Region as subject:
Asia
Language:
Zh
Journal:
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Year:
2018
Document type:
Article
Affiliation country:
China