Final answer:
A priority nursing assessment for a client receiving gentamicin IV is to monitor the client for hearing loss due to potential ototoxicity.
Step-by-step explanation:
A priority nursing assessment for a client receiving gentamicin (Garamycin) intravenously (IV) is to monitor the client for hearing loss. Gentamicin is known to have potential ototoxicity, which can result in hearing loss and vestibular toxicity. Therefore, it is important for the nurse to assess the client's hearing before and during the treatment to detect any changes in hearing function.