The nurse is preparing to assess the visual acuity of a patient.
How should the nurse proceed?

Choice A rationale

Partially withdrawing and redirecting the needle after aspirating blood significantly increases the risk of tissue trauma, pain, and the formation of a hematoma at the injection site. Furthermore, there is a risk of inadvertently injecting medication into a blood vessel or the interstitial tissue, which could lead to complications such as nerve damage or localized irritation.

Choice B rationale

Aspirating blood indicates the needle tip has entered a blood vessel. Administering medication intravenously when an intramuscular injection is intended can have serious systemic consequences, including rapid absorption and potential adverse drug reactions or toxicity. Therefore, the safest action is to withdraw the needle, discard the contaminated medication, and prepare a new dose to ensure proper drug delivery.

Choice C rationale

Administering the drug despite aspirating blood significantly increases the risk of injecting the medication directly into a blood vessel (intravascular injection) rather than the muscle. This can lead to rapid systemic absorption, potentially causing adverse effects or toxicity, and may also result in a larger, more painful hematoma and delayed drug action.

Choice D rationale

Continuing to administer the drug after aspirating blood, regardless of the injection speed, is dangerous because it confirms the needle's placement within a blood vessel. Intravascular administration of an IM medication can lead to immediate systemic effects, allergic reactions, or drug overdose, bypassing the intended slower absorption rate of muscle tissue, and increasing risk of complications.

Choice A rationale

Pain sensation behind the eyes, particularly during palpation of the frontal or ethmoid sinuses, suggests inflammation or infection within these sinuses. Under normal conditions, healthy paranasal sinuses are air-filled cavities and should not elicit pain upon palpation.

Choice B rationale

Pain during palpation of any sinus area is indicative of sinusitis or inflammation. The presence of pain signifies pressure buildup, mucosal edema, or infection within the sinus cavities. Normal findings would not involve pain, but rather a sensation of mild pressure.

Choice C rationale

Normal findings during sinus palpation should elicit a sensation of pressure but no pain or tenderness. This indicates that the sinuses are air-filled, patent, and free from inflammation or congestion. The pressure is a result of the gentle digital compression over the bony structures.

Choice D rationale

Tingling along the nose and eyes is not a typical sensation associated with normal sinus palpation. This sensation might suggest neurological irritation, such as nerve compression or neuropathy, rather than a direct physiological response from the paranasal sinuses themselves.