Correct Answer: D

Rationale: When a healthcare provider prescribes a dose that is higher than normal, it is crucial for the nurse to contact the provider to clarify the prescription. Administering the prescribed dose without clarification can lead to potential harm to the patient due to the elevated dosage. Asking another nurse to verify the dose may not provide the necessary clarification from the prescriber. Administering only half of the prescribed dose without consulting the healthcare provider is not the appropriate action, as the full rationale behind the higher dose needs to be understood before any administration.

Correct Answer: B

Rationale: The correct answer is to recheck the blood pressure before calling for help. When caring for a client with unstable blood pressure, the nurse's priority is to ensure an accurate assessment. Rechecking the blood pressure will confirm the instability and guide further actions. Asking the charge nurse for assistance (Choice A) is important but should come after assessing the situation. Monitoring the client's blood pressure closely (Choice C) is essential, but the immediate action should be to recheck and confirm the current status. Administering antihypertensive medication immediately (Choice D) without a confirmed assessment can be dangerous and is not the initial priority.

Correct Answer: B

Rationale: The most important nursing action when caring for a patient with a central venous catheter (CVC) is to change the CVC dressing every 72 hours. This practice reduces the risk of infection and ensures the catheter remains secure. Monitoring the patient's blood pressure regularly is important but not the most crucial action when managing a CVC. Flushing the CVC with normal saline is essential but not the most important action. Avoiding using the CVC for blood draws is a good practice, but it is not the most critical nursing action in this scenario.

Correct Answer: B

Rationale: The correct answer is B: Prioritize a chest x-ray for the client. When a client presents with severe dyspnea, a chest x-ray should be prioritized as it helps in assessing the lungs and heart, which are crucial in cases of respiratory distress. Echocardiograms are more focused on assessing heart function and may not provide immediate information needed in cases of dyspnea. CT scans and MRIs are more detailed imaging studies that are not typically the first-line diagnostic tests for severe dyspnea.

Correct Answer: B

Rationale: The correct action to promote healing in a patient with impaired skin integrity is to use sterile saline to clean the wound. Sterile saline helps prevent infection and promotes healing of wounds by keeping the area clean. Applying a dry, sterile dressing (Choice A) may not be effective as it does not address the need for wound cleaning. Applying a warm compress (Choice C) may not be suitable for all types of wounds and could potentially cause harm. Keeping the wound open to air (Choice D) is generally not recommended as it can lead to infection and slow down the healing process.