Correct Answer: D

Rationale: Administering oxygen via a non-rebreather mask is the appropriate intervention for a client at risk for pulmonary edema as it helps improve oxygenation by delivering a high concentration of oxygen. Placing the client in a supine position can exacerbate pulmonary edema by increasing venous return to the heart, leading to fluid overload. Encouraging increased fluid intake is contraindicated in clients with heart failure and at risk for pulmonary edema, as it can worsen fluid accumulation. Elevating the client's legs when in bed is more appropriate for clients with conditions such as venous insufficiency or edema in the lower extremities, not for pulmonary edema.

Correct Answer: B

Rationale: The correct answer is B. A high PaCO2 level (55 mm Hg) in a client with chronic emphysema suggests respiratory acidosis, which requires further treatment. In chronic emphysema, impaired gas exchange leads to elevated carbon dioxide levels in the blood. Option A (PaO2 level of 89 mm Hg) is near the normal range and does not indicate immediate treatment. Option C (HCO3 level of 25 mEq/L) and option D (pH level of 7.37) are within normal limits and do not suggest the need for further treatment in this context.

Correct Answer: A

Rationale: The correct answer is A: Administer anticoagulants. Administering anticoagulants is the most appropriate nursing intervention for a patient with suspected DVT because it helps prevent further clot formation and complications. Applying compression stockings (choice B) can be a preventive measure but is not the primary intervention for treating DVT. Encouraging ambulation (choice C) is beneficial for preventing DVT but is not the immediate intervention for a suspected case. Monitoring oxygen saturation (choice D) is important for assessing respiratory function but is not the primary intervention for DVT treatment.

Correct Answer: C

Rationale: The correct intervention for a client with dementia who is frequently agitated is to use a calm and reassuring approach when speaking to them. This approach helps reduce agitation and create a more therapeutic environment. Offering several choices may overwhelm the client and increase agitation, making choice A incorrect. Confronting the client can escalate the situation and worsen agitation, making choice B inappropriate. While encouraging stimulating activities is beneficial, it may not be the most effective intervention for immediate agitation management, making choice D less priority compared to using a calm and reassuring approach.

Correct Answer: A

Rationale: Choice A is the correct answer because consuming a snack when the blood glucose level is below 70 mg/dL helps prevent hypoglycemia in clients with diabetes mellitus. Choice B is incorrect because taking insulin when blood glucose is high (above 200 mg/dL) helps manage hyperglycemia, not hypoglycemia. Choice C is incorrect as checking blood glucose levels once a week is insufficient for proper diabetes management, which typically requires more frequent monitoring. Choice D is incorrect because waiting for symptoms of hyperglycemia to take insulin can lead to uncontrolled blood glucose levels.