Correct Answer: A

Rationale: The correct answer is A: Ensure the injection produces a wheal on the skin. A wheal indicates that the PPD has been administered correctly, allowing for the proper interpretation of results. Administering the injection in the client's thigh (choice B) is not the recommended site for PPD administration; it should be administered intradermally. Using an 18-gauge needle (choice C) is unnecessary and not the standard practice for PPD administration as a smaller gauge needle is preferred for intradermal injections. Massaging the site after injection (choice D) can lead to inaccurate results by dispersing the solution, so it is important to avoid touching the site after the injection to prevent altering the test results.

Correct Answer: D

Rationale: The correct answer is to keep the oxygen equipment at least 6 feet away from heat sources. Placing oxygen equipment near heat sources can lead to fire hazards due to the oxygen's combustible nature. Option A is the correct safety measure as smoking near oxygen equipment can cause fires due to oxygen's flammable properties. Option B regarding the use of non-flammable bedding is not directly related to oxygen safety. Option C is important for proper oxygen tank functioning but is not as critical as keeping the equipment away from heat sources to prevent fires.

Correct Answer: C

Rationale: When managing a client with delirium, the priority should be to identify the underlying cause of the delirium. Delirium can result from various triggers such as infections, medication side effects, or metabolic imbalances. By determining the root cause, healthcare professionals can provide targeted treatment and improve outcomes. Administering sedative medication (Choice A) could exacerbate delirium as these drugs can worsen confusion. While providing a low-stimulation environment (Choice B) is beneficial, it is not as critical as identifying the cause. Controlling behavioral symptoms with medication (Choice D) should only be considered after identifying and addressing the underlying cause of delirium.

Correct Answer: B

Rationale: The correct answer is B: Potassium. Furosemide is a loop diuretic that can cause potassium depletion through increased urinary excretion. Monitoring potassium levels is crucial to prevent hypokalemia, which can lead to cardiac dysrhythmias, muscle weakness, and other serious complications. Monitoring sodium, calcium, and magnesium levels is not typically associated with furosemide therapy, making choices A, C, and D incorrect.

Correct Answer: A

Rationale: The correct nursing intervention for a patient receiving anticoagulant therapy is to monitor INR levels and check for signs of bleeding. Monitoring the INR levels helps assess the effectiveness and safety of anticoagulant therapy, while checking for bleeding is essential due to the increased risk associated with anticoagulants. Choice B is incorrect as antiplatelet therapy is not the standard treatment for patients on anticoagulant therapy. Choice C is incorrect as providing additional anticoagulation is not a direct nursing intervention in this scenario. Choice D is incorrect because administering aspirin, an antiplatelet medication, along with anticoagulants can increase the risk of bleeding and is generally avoided.