Ear-canal atresia could result in hearing loss of ………. .
a). 20 dB
b). 20 to 30 dB
c). 30 to 35 dB
d). 55 to 70 dB
e). > 70 dB
Correct Answer: d
Ear-canal atresia is a congenital disorder, where one or both ear canals are completely occluded.
The mild form of this congenital anomaly is characterised by a small ear canal and a nearly normal middle ear. In the most severe form, the ear canal is completely occluded, and the middle-ear space is small or absent.
It impairs the transmission of sound to the tympanic membrane and the function of the middle ear may be impaired.
a). 20 dB
b). 20 to 30 dB
c). 30 to 35 dB
d). 55 to 70 dB
e). > 70 dB
Correct Answer: d
Ear-canal atresia is a congenital disorder, where one or both ear canals are completely occluded.
The mild form of this congenital anomaly is characterised by a small ear canal and a nearly normal middle ear. In the most severe form, the ear canal is completely occluded, and the middle-ear space is small or absent.
It impairs the transmission of sound to the tympanic membrane and the function of the middle ear may be impaired.
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