A nurse is assisting with teaching a newly licensed nurse about preventing puncture injuries. Which of the following instructions should the nurse include?

A. A 5 mL syringe can hold up to 5 mL of fluid. It is suitable for administering 2 mL of medication, as it provides enough capacity with some additional space to ensure accurate measurement and prevent overfilling.

B. A 1 mL syringe is too small for administering a 2 mL injection. It would not accommodate the entire volume, and attempting to draw and administer 2 mL with a 1 mL syringe could result in spillage or inaccurate dosing.

C. A 10 mL syringe is larger than necessary for administering a 2 mL injection. While it can hold the required volume and more, it is bulkier and might be less convenient for administering smaller volumes like 2 mL.

D. A 3 mL syringe can also accommodate a 2 mL injection. However, a 5 mL syringe would provide a more appropriate capacity with a bit of extra space, which can be beneficial for accurate measurement and ease of administration.

D. Persistent headache can occur with elevated levels of gentamicin, as it may indicate neurotoxicity. Gentamicin can cause neurotoxic effects, including headaches, especially when levels are elevated.

E. Tinnitus (ringing in the ears) is a classic symptom of gentamicin toxicity. Elevated gentamicin levels can lead to ototoxicity, which manifests as tinnitus among other auditory symptoms.

A. Insomnia is not typically associated with elevated levels of gentamicin. Elevated gentamicin levels are not known to cause insomnia.

B. Constipation is not typically associated with elevated levels of gentamicin. Elevated gentamicin levels are not known to cause constipation.

C. Xerostomia (dry mouth) is not typically associated with elevated levels of gentamicin. Elevated gentamicin levels are not known to cause xerostomia.