The nurse calculates that a patient must receive 1.3 mL of an anti-infective agent. The dose is ordered IM. Which of the following choices demonstrates safe, evidence-based practice?

Choice A Reason: Using a 23-gauge, 1-inch needle for an intramuscular (IM) injection in the deltoid muscle is generally appropriate for adults. The deltoid muscle is a common site for IM injections, especially for small volumes of medication (up to 2 mL). The acromion process is a correct landmark for locating the deltoid muscle. However, the deltoid muscle is not the best site for larger volumes or more viscous medications. Additionally, the needle length might not be sufficient for individuals with more subcutaneous fat, potentially leading to suboptimal medication delivery. Choice B Reason: A 25-gauge, 0.5-inch needle is typically used for subcutaneous injections rather than intramuscular injections. The rectus femoris muscle can be used for IM injections, but it is not the preferred site due to the potential for increased pain and discomfort. Aspiration before injection is a debated practice; current guidelines suggest that aspiration is not necessary for most IM injections, except when injecting into the dorsogluteal site, which is not recommended due to the risk of hitting the sciatic nerve. Choice C Reason: A 27-gauge, 1.5-inch needle is appropriate for IM injections, and the vastus lateralis is a suitable site, especially for infants and young children. However, massaging the injection site after administering an IM injection is not recommended. Massaging can cause the medication to disperse into the subcutaneous tissue, reducing its effectiveness and potentially causing irritation or bruising. Choice D Reason: Using a 21-gauge, 1.5-inch needle for an IM injection in the ventrogluteal area is considered safe and effective. The ventrogluteal site is preferred for IM injections because it is free from major nerves and blood vessels, reducing the risk of injury. The Z-track technique is used to prevent medication from leaking into the subcutaneous tissue, ensuring that it remains in the muscle for proper absorption. This technique is particularly useful for medications that can stain or irritate the skin and subcutaneous tissue.