Sensorineural Hearing Loss following Carbon Monoxide Poisoning

Area of Science:

• Neurology
• Audiology
• Toxicology

Background:

• Carbon monoxide (CO) poisoning is a leading cause of accidental poisoning deaths.
• Anoxic brain injury and sensorineural hearing loss are potential sequelae of severe CO poisoning.
• Early diagnosis and management are crucial to prevent long-term neurological deficits.

Observation:

• A 17-year-old male presented with anoxic brain injury and sensorineural hearing loss after carbon monoxide exposure.
• Audiological evaluation demonstrated a mild-to-severe, slightly asymmetrical sensorineural hearing loss in both ears.
• Word recognition scores were fair to poor at conversational speech levels in quiet environments.

Findings:

• The case highlights a significant correlation between carbon monoxide poisoning and auditory system damage.
• Sensorineural hearing loss, even when mild-to-severe, can substantially impair speech understanding.
• The findings underscore the importance of comprehensive audiological assessment in patients with CO poisoning.

Implications:

• This case emphasizes the need for heightened awareness of potential hearing deficits following carbon monoxide exposure.
• Management strategies should address both the neurological and audiological consequences of CO poisoning.
• Further research is warranted to elucidate the pathophysiology and optimize treatment for CO-induced hearing loss.