Correct Answer: A

Rationale: The correct technique for administering an intramuscular (IM) injection is to locate the injection site and insert the needle at a 90-degree angle. This angle ensures that the medication is delivered into the muscle for proper absorption. Choice B is incorrect because a 45-degree angle is typically used for subcutaneous injections, not intramuscular. Choice C is incorrect as massaging the site after an injection can cause the medication to disperse unevenly. Choice D is incorrect as a 15-degree angle would not reach the muscle layer effectively for an IM injection.

Correct Answer: A

Rationale: The correct answer is to administer nitroglycerin. Nitroglycerin is the priority intervention for a patient with chest pain because it helps relieve chest pain by dilating coronary arteries, improving blood flow to the heart muscle. Assessing pain level, monitoring vital signs, and providing oxygen therapy are important interventions as well, but administering nitroglycerin takes precedence in addressing the immediate symptom of chest pain and potential cardiac ischemia.

Correct Answer: B

Rationale: A serum albumin level of 3 g/dL is indicative of poor nutrition, a common factor in the development of pressure ulcers. The Braden scale assesses the risk of developing pressure ulcers but does not reflect the client's medical history. Hemoglobin level is more related to oxygen-carrying capacity rather than pressure ulcer development. The Norton scale evaluates risk for developing pressure ulcers but is not typically part of a client's medical history.

Correct Answer: D

Rationale: In this scenario, offering pain medication to a postoperative client before ambulation is an example of beneficence. Beneficence is the ethical principle related to promoting the well-being of the client, which includes providing pain relief to improve the client's comfort and facilitate their recovery. Fidelity (choice A) is about honoring commitments and being faithful to agreements, not directly related to pain management. Autonomy (choice B) refers to respecting the client's right to make decisions about their care, not specifically about pain medication administration. Justice (choice C) involves fairness and equality in healthcare resource allocation, not directly applicable in this situation.

Correct Answer: B

Rationale: The correct first action for a client with an NG tube experiencing nausea and decreased gastric secretions is to irrigate the NG tube with sterile water. This helps alleviate blockages and can improve the client's symptoms. Increasing the suction pressure (Choice A) may exacerbate the issue and cause further discomfort. Turning the client onto their left side (Choice C) is not directly related to addressing the reported symptoms. Replacing the NG tube with a new one (Choice D) should be considered only after attempting initial interventions like irrigation.