Hearing loss with stapedotomy and treated otitis media

Area of Science:

• Otolaryngology
• Infectious Diseases
• Surgical Innovation

Background:

• Pseudomonas aeruginosa otitis media (PA OM) is a potential risk factor for hearing complications.
• Stapedotomy is a surgical procedure to restore hearing in cases of otosclerosis.
• The impact of prior PA OM on stapedotomy outcomes, specifically sensorineural hearing loss (SNHL), requires investigation.

Purpose of the Study:

• To evaluate whether treated PA OM influences the risk of SNHL following stapedotomy.
• To compare SNHL rates in guinea pigs with treated PA OM versus untreated PA OM after stapedotomy.

Main Methods:

• The study involved inducing PA OM in guinea pigs.
• Animals were divided into groups: stapedotomy before antibiotic treatment (untreated), stapedotomy after treatment (treated), and saline controls.
• Electrocochleography and histomorphological analysis of temporal bones were used to assess hearing and cochlear damage.

Main Results:

• Treated ears showed significantly less SNHL post-stapedotomy compared to untreated ears (P = 0.0268).
• Hearing loss in treated ears was comparable to control groups (P = 0.9370).
• Untreated ears exhibited severe damage to cochlear outer hair cells.

Conclusions:

• Previously treated PA OM does not elevate the risk of SNHL when undergoing stapedotomy.
• Stapedotomy can be cautiously performed in patients with inactive, chronic otitis media.