Which agent has been linked to hearing loss when accidentally introduced into the inner ear?

Which agent has been linked to hearing loss when accidentally introduced into the inner ear?

• A. Alcohols
• B. Chlorhexidine gluconate (CHG)
• C. Hexachlorophene
• D. Iodophors

Answer: (B)

Hearing loss from substances entering the inner ear comes from ototoxicity, where the delicate cochlear hair cells and vestibular structures are damaged by chemicals. Chlorhexidine gluconate is particularly linked to this risk: if it is accidentally introduced into the inner ear, its toxic effects can cause irreversible sensorineural hearing loss. This is why CHG must be avoided in otologic contexts or near the inner ear, and why alternatives or meticulous techniques are emphasized to prevent any contact with the inner ear. While other antiseptics can be hazardous in different ways, the strongest and most documented association with inner-ear damage from accidental exposure is chlorhexidine gluconate.

Hearing loss from substances entering the inner ear comes from ototoxicity, where the delicate cochlear hair cells and vestibular structures are damaged by chemicals. Chlorhexidine gluconate is particularly linked to this risk: if it is accidentally introduced into the inner ear, its toxic effects can cause irreversible sensorineural hearing loss. This is why CHG must be avoided in otologic contexts or near the inner ear, and why alternatives or meticulous techniques are emphasized to prevent any contact with the inner ear. While other antiseptics can be hazardous in different ways, the strongest and most documented association with inner-ear damage from accidental exposure is chlorhexidine gluconate.