Correct Answer: B

Rationale: The correct answer is to check gastric residual volumes every 4 hours. This action helps prevent aspiration by ensuring the stomach is emptying properly, reducing the risk of reflux and aspiration. Elevating the head of the bed to 30 degrees can help prevent aspiration by promoting proper digestion and reducing the risk of regurgitation. Administering the feeding at room temperature is important for patient comfort but does not directly prevent aspiration. Flushing the feeding tube with water every 8 hours is important for tube patency but does not directly prevent aspiration.

Correct Answer: A

Rationale: The correct action for the nurse to take when a client with a history of angina reports chest pain is to administer sublingual nitroglycerin every 5 minutes. Nitroglycerin helps dilate blood vessels, improving blood flow to the heart and relieving chest pain associated with angina. Aspirin is often given during a suspected heart attack, not for immediate relief of angina. Deep breathing exercises may be beneficial for anxiety or respiratory conditions but are not the first-line intervention for angina. Oxygen therapy is not the initial treatment for angina unless the client is hypoxic.

Correct Answer: B

Rationale: The correct intervention for a client with nonblanchable erythema over the ischium is to teach the client to shift his weight every 15 minutes while sitting. This action helps relieve pressure on the affected area and prevents further skin breakdown. Placing the client upright on a donut-shaped cushion (Choice A) may not address the need for frequent weight shifts. Turning and repositioning the client every 3 hours (Choice C) is important for overall skin health but may not provide adequate relief for the specific area of nonblanchable erythema. Assessing pressure points every 24 hours (Choice D) is not frequent enough to prevent worsening of the skin condition in this case.

Correct Answer: A

Rationale: The correct answer is A: Follow a 3g sodium diet. For clients with chronic heart failure, limiting sodium intake is crucial to prevent fluid retention and exacerbation of heart failure symptoms. High sodium intake can lead to fluid buildup, causing the heart to work harder. Choices B, C, and D are incorrect. Drinking excessive fluid can worsen fluid retention in heart failure, elevating the workload of the heart. Placing the client's lower extremities on two pillows is a positioning intervention to alleviate edema, not a dietary recommendation. Maintaining oxygen saturation at 89% is more related to respiratory status rather than dietary management of chronic heart failure.

Correct Answer: B

Rationale: Clients with a low platelet count are at risk of bleeding and infection. Monitoring the client's temperature every 4 hours is crucial to detect early signs of infection, as they may not be able to mount a typical immune response due to their compromised platelet count. Administering aspirin (choice A) is contraindicated in clients with low platelet counts as it can further increase the risk of bleeding. Monitoring urine output (choice C) and checking for stool in a colostomy bag (choice D) are important aspects of care but are not the priority in a client with low platelet count.