Correct Answer: A

Rationale: The vastus lateralis is the preferred site for IM injections in infants due to muscle development. In infants under 1 year old, the vastus lateralis muscle in the thigh is often used for IM injections due to its size and development. The deltoid muscle is typically used for adults, and the ventrogluteal and dorsogluteal sites are more commonly used for older children and adults. Therefore, the best choice for administering an IM injection to a 6-month-old child is the vastus lateralis.

Correct Answer: A

Rationale: Choice A is the best response because it educates the client about the role of heparin in preventing future clot formation rather than dissolving the existing clot. This helps the client understand the medication's function and the importance of closely monitoring for signs of bleeding, a common side effect of heparin therapy. Choice B acknowledges the client's concern but does not provide accurate information about heparin's mechanism of action. Choice C is premature as it suggests transitioning to home therapy without addressing the client's concerns or explaining heparin's purpose. Choice D does not address the client's statement and instead questions their desire to leave the hospital.

Correct Answer: C

Rationale: Keeping the radiated area dry and clean is crucial to prevent skin irritation and infection. Radiation therapy can cause skin changes, making it susceptible to irritation and infection. Using sunscreen (Choice A) is not usually recommended on the radiated area as it can further irritate the skin. Applying lotion (Choice B) may not be suitable as it can trap moisture and cause skin breakdown. While encouraging exercise (Choice D) is important, keeping the area dry and clean takes precedence to prevent complications during radiation therapy.

Correct Answer: C

Rationale: The correct action for the nurse to take first is to assess the client's oxygen saturation level. In a client with COPD and abnormal respiratory and heart rates, determining the oxygen saturation helps evaluate the adequacy of oxygen exchange and the severity of respiratory distress. Administering a bronchodilator (choice A) can be appropriate but assessing oxygen saturation takes priority. Encouraging deep breathing and coughing (choice B) may not address the immediate need for oxygenation assessment. Obtaining an arterial blood gas (choice D) is important but typically follows the initial assessment of oxygen saturation.

Correct Answer: D

Rationale: Imbalanced nutrition is the most critical nursing diagnosis to address in this scenario. The patient's significant weight loss and neglect of basic needs, such as eating and personal hygiene, indicate a severe imbalance in nutrition. Addressing this issue is crucial to prevent further health deterioration. Self-care deficit, disturbed sleep pattern, and disturbed thought processes are important but secondary concerns compared to the immediate risk posed by imbalanced nutrition. While self-care deficit and disturbed sleep pattern are valid concerns, the patient's weight loss and neglect of basic needs take precedence. Disturbed thought processes are also significant but addressing the imbalanced nutrition is more urgent in this context.