[Conductive hearing loss with a normal eardrum]

Area of Science:

• Otolaryngology
• Medical Imaging

Background:

• Conductive hearing loss with a normal eardrum involves impaired sound transmission despite an intact eardrum and cochlear nerve.
• This condition is frequent, has significant socio-professional consequences, and is often treatable surgically or with hearing aids.

Purpose of the Study:

• To detail the diagnostic approach for conductive hearing loss with a normal eardrum.
• To highlight the role of CT scans in diagnosis and preoperative assessment.
• To review the causes, including middle ear pathologies and inner ear abnormalities.

Main Methods:

• Review of anatomical structures of the tympano-ossicular system.
• Discussion of diagnostic, differential, and etiological considerations.
• Emphasis on the contribution of modern digital imaging, particularly CT scans.

Main Results:

• Otosclerosis and other middle ear pathologies are common causes.
• Advances in digital imaging have identified inner ear abnormalities as potential causes of conductive or mixed hearing loss.
• CT scans are vital for diagnostic orientation and surgical planning.

Conclusions:

• Accurate diagnosis of conductive hearing loss with a normal eardrum is essential due to its prevalence and impact.
• CT imaging plays a pivotal role in identifying underlying pathologies.
• A comprehensive understanding of tympano-ossicular anatomy and pathologies is necessary for effective management.