A nurse is conversing with a client who has a new diagnosis of gout.
When the client asks the nurse how she got the disorder, the nurse should explain that gout develops when?

Choice A rationale

Otitis externa is an inflammation or infection of the external auditory canal, often referred to as swimmer ear. It is typically caused by bacterial or fungal overgrowth in the outer ear canal due to moisture or trauma. Aspirin use does not have a known physiological mechanism that would cause infection of the external ear structure. The symptoms mentioned, like hearing disturbances, originate in the inner ear or nerve pathways rather than the external canal.

Choice B rationale

Vertigo is a sensation of spinning or dizziness often associated with inner ear imbalances or vestibular nerve issues. While aspirin can sometimes cause dizziness as a side effect, the specific report of hearing disturbances is more indicative of damage to the cochlear system rather than just a balance issue. Vertigo alone does not capture the full scope of potential sensory damage to the cranial nerve VIII that high doses of acetylsalicylic acid can cause over time.

Choice C rationale

Nystagmus involves involuntary, rapid, and repetitive eye movements that can be horizontal, vertical, or rotary. It is often a sign of vestibular dysfunction or central nervous system pathology. Although aspirin toxicity can affect the neurological system, nystagmus is not the primary or most common indicator of salicylate-induced sensory damage. Hearing loss and tinnitus are the classic early warning signs of aspirin reaching toxic levels in the blood, which requires immediate dose adjustment.

Choice D rationale

Ototoxicity refers to the toxic effect that certain medications, including high-dose aspirin, have on the inner ear or the vestibulocochlear nerve. Salicylates can disrupt the electrochemical balance in the cochlea, leading to tinnitus and hearing impairment. Monitoring for these symptoms is crucial because the damage can sometimes become irreversible if the dose is not reduced. By decreasing the aspirin dosage, the nurse helps protect the delicate sensory hair cells from further chemical-induced injury.

Choice A rationale

Amiodarone is a class III antiarrhythmic medication primarily utilized for ventricular and supraventricular tachycardias. Its common side effect profile includes pulmonary toxicity, thyroid dysfunction, and corneal microdeposits. Unlike certain other cardiac medications, it is not traditionally classified as a primary ototoxic agent. It does not typically cause significant damage to the hair cells of the cochlea or the vestibulocochlear nerve during standard therapeutic use.

Choice B rationale

Loop diuretics, such as furosemide, are well-documented ototoxic agents. These medications inhibit the sodium-potassium-chloride symporter in the thick ascending limb of the loop of Henle and can also alter the electrolyte balance in the stria vascularis of the inner ear. This disruption in endolymph composition can lead to temporary or permanent hearing loss and tinnitus, particularly when administered rapidly or at high doses via intravenous routes.

Choice C rationale

Nonsteroidal anti-inflammatory drugs, or NSAIDs, including aspirin and ibuprofen, can cause ototoxicity when taken in high doses. These agents inhibit prostaglandin synthesis and can decrease blood flow to the cochlea, leading to cellular metabolic stress. Patients frequently report tinnitus, which is often reversible once the medication is discontinued. Monitoring is essential as chronic high-dose therapy can result in a more persistent sensorineural hearing impairment.

Choice D rationale

Vancomycin is a potent glycopeptide antibiotic used for serious gram-positive infections. It is recognized for its potential to cause nephrotoxicity and ototoxicity, especially when serum trough levels exceed the normal range of 15 to 20 mcg/mL. The mechanism involves direct damage to the auditory nerve or the cochlear hair cells. Risk increases significantly when combined with other ototoxic drugs, requiring close monitoring of hearing and renal function.

Choice E rationale

Cimetidine is a histamine H2-receptor antagonist used to reduce gastric acid secretion in conditions like peptic ulcer disease and GERD. While it has several systemic side effects and drug interactions due to cytochrome P450 inhibition, it is not classified as an ototoxic medication. It does not typically interfere with the delicate neurosensory structures of the ear or the fluid dynamics necessary for normal auditory processing.