The cochlear implant is done in –
**Core Concept**
The cochlear implant is a medical device designed to bypass damaged or non-functioning parts of the ear and directly stimulate the auditory nerve, allowing individuals with severe to profound sensorineural hearing loss to perceive sound.
**Why the Correct Answer is Right**
Cochlear implants are typically performed in individuals with severe to profound sensorineural hearing loss, particularly those who receive little to no benefit from traditional hearing aids. The procedure involves inserting an electrode array into the cochlea, which is the spiral-shaped structure in the inner ear responsible for sound processing. The electrode array is connected to a sound processor that converts sound into electrical signals, which are then transmitted to the cochlea to stimulate the auditory nerve. This bypasses damaged hair cells in the cochlea, allowing the individual to perceive sound.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because cochlear implants are not typically performed in individuals with conductive hearing loss, which is a type of hearing loss caused by problems with the middle ear.
**Option B:** This option is incorrect because cochlear implants are not typically performed in individuals with normal hearing or mild hearing loss, as they are not necessary in these cases.
**Option C:** This option is incorrect because while some individuals with single-sided deafness may benefit from cochlear implants, it is not the most common indication for the procedure.
**Clinical Pearl / High-Yield Fact**
It's essential for clinicians to carefully assess the auditory system and select candidates who are likely to benefit from cochlear implantation, as the procedure is not without risks and complications.
**Correct Answer: D. Individuals with severe to profound sensorineural hearing loss.**