Ototoxic drugs generally affect the hearing of what frequencies of sound
**Core Concept**
Ototoxicity refers to the adverse effects of certain medications on the auditory system, leading to hearing impairment. This phenomenon is often associated with the damage to the hair cells in the cochlea, specifically affecting high-frequency sound waves.
**Why the Correct Answer is Right**
The ototoxic effect of certain drugs, such as aminoglycosides and loop diuretics, is primarily due to their ability to disrupt the function of the hair cells in the cochlea. These hair cells are responsible for converting mechanical energy from sound waves into electrical signals that are transmitted to the brain. The high-frequency sound waves are more susceptible to damage due to the longer basilar membrane and the greater mechanical stress on the hair cells at higher frequencies. As a result, ototoxic drugs tend to affect hearing in the higher frequency ranges, particularly in the range of 4,000-8,000 Hz.
**Why Each Wrong Option is Incorrect**
**Option A:** High-frequency hearing loss is not the primary effect of ototoxic drugs; low-frequency hearing loss is more commonly associated with noise-induced hearing loss.
**Option B:** Middle-frequency hearing loss is not specifically associated with ototoxic drugs; it is more commonly seen in cases of mixed hearing loss.
**Option C:** Very low-frequency hearing loss is not typically affected by ototoxic drugs; it is more commonly associated with conditions such as otosclerosis.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that ototoxicity can be reversible if the offending medication is discontinued promptly. However, prolonged exposure to ototoxic drugs can lead to permanent hearing impairment.
**Correct Answer: C. High-frequency sound waves.**