Correct Answer: D

Rationale: The best response for the nurse to support a client expressing frustration over their chronic illness is to validate their feelings and listen to their concerns (Option D). This approach helps acknowledge the client's emotions, demonstrates empathy, and establishes a therapeutic relationship. By validating the client's feelings and actively listening to their concerns, the nurse offers a supportive environment for the client to express their frustrations. Choices A, B, and C are not the best responses in this situation. While joining a support group, discussing a cure, or focusing on positive aspects can be beneficial interventions, the immediate priority is to validate the client's feelings and provide a space for them to express their frustrations.

Correct Answer: B

Rationale: The inner forearm is the preferred site for administering a tuberculin skin test (TST) due to its easy accessibility, minimal hair interference, and good visibility of the injection site, allowing for accurate interpretation of the test results. The deltoid muscle, abdomen, and thigh are not preferred sites for a TST as they may not provide the optimal conditions required for the test. The deltoid muscle is commonly used for intramuscular injections, the abdomen may have varying subcutaneous fat thickness affecting the test, and the thigh may not provide the necessary visibility for accurate reading.

Correct Answer: C

Rationale: The correct answer is C: 'It causes vasoconstriction of the blood vessels.' Sodium can lead to vasoconstriction, which narrows the blood vessels, increasing resistance to blood flow and subsequently raising blood pressure. Choices A, B, and D are incorrect. Sodium does not decrease blood viscosity, but it can lead to fluid retention, which increases blood volume and pressure. It does not enhance the excretion of potassium; instead, high sodium intake can lead to potassium excretion by the kidneys.

Correct Answer: D

Rationale: In managing COPD with a metered-dose inhaler (MDI), the nurse should emphasize all of the techniques mentioned. Using a spacer can help improve drug delivery and reduce the risk of oral thrush. Synchronizing breaths with inhaler activation ensures proper medication delivery to the lungs. Regular cleaning of the inhaler prevents blockages and ensures optimal functioning. Therefore, all these techniques are important for effective COPD management, making 'All of the above' the correct answer. Choices A, B, and C are all crucial components of proper MDI technique in COPD, so they are not individually sufficient without the others.

Correct Answer: B

Rationale: The most important instruction the nurse should provide is to monitor pulse rate daily before taking the medication. Digoxin can lead to bradycardia, so it is crucial to assess the pulse rate before administering the medication. This practice helps ensure that the heart rate is not too low for the safe use of digoxin. Choice A is incorrect as there is no specific requirement to take digoxin with a high-fiber meal. Choice C is also incorrect because there is no need to avoid dairy products while on digoxin. Choice D is incorrect since blurred vision is not a common side effect of digoxin; hence, it is not the most critical instruction to provide.