A nurse is collecting a medication history from a client who is scheduled to have a cardiac catheterization. Which of the following medications taken by the client interacts with contrast material and places the client at risk for acute kidney injury?

Choice A: Metformin

Reason: Metformin is known to interact with contrast material, particularly iodinated contrast media, and can increase the risk of acute kidney injury (AKI). This interaction can lead to a condition known as contrast-induced nephropathy (CIN) or contrast-induced acute kidney injury (CI-AKI). Metformin is primarily excreted by the kidneys, and impaired renal function can lead to its accumulation, increasing the risk of lactic acidosis, a rare but serious complication. Therefore, it is generally recommended to withhold metformin before and after the administration of contrast media until renal function is confirmed to be normal.

Choice B: Carvedilol

Reason: Carvedilol is a beta-blocker used to treat high blood pressure and heart failure. It does not have a known interaction with contrast media that would increase the risk of acute kidney injury. Carvedilol primarily affects the cardiovascular system and does not significantly impact renal function or interact with contrast agents.

Choice C: Nitroglycerin

Reason: Nitroglycerin is used to treat angina and other heart conditions by dilating blood vessels. It does not interact with contrast media in a way that would increase the risk of acute kidney injury. Nitroglycerin’s primary effects are on the cardiovascular system, and it does not have nephrotoxic properties.

Choice D: Atorvastatin

Reason: Atorvastatin is a statin used to lower cholesterol levels. While it can have effects on liver enzymes and muscle tissue, it does not interact with contrast media to increase the risk of acute kidney injury. Atorvastatin is metabolized by the liver and does not significantly impact renal function.

Choice A reason: The first priority in this situation is to ensure the client’s airway is secure. Difficulty breathing and stridor indicate a potential airway obstruction, which can be life-threatening. Activating the hospital’s emergency or rapid response system ensures that the client receives immediate medical attention from a team equipped to handle such emergencies. This step is crucial to prevent respiratory arrest and other complications.

Choice B reason: While placing a heart monitor on the client and observing for dysrhythmias is important, it is not the immediate priority in this scenario. The client’s airway and breathing take precedence over monitoring heart rhythms. Once the airway is secured and breathing is stabilized, then monitoring for dysrhythmias can be considered.

Choice C reason: Asking the charge nurse to come see the client immediately is a reasonable action, but it is not the most effective first step. The charge nurse may not have the necessary equipment or expertise to handle an acute airway obstruction. Activating the emergency or rapid response system ensures that a specialized team responds quickly.

Choice D reason: Checking the client’s blood pressure and heart rate is important for overall assessment, but it is not the immediate priority when there is a potential airway obstruction. Ensuring the client can breathe is the most critical action. Vital signs can be checked once the airway is secured.

Choice E reason: Providing a calm and assuring environment for the client is beneficial for reducing anxiety, but it does not address the immediate threat to the client’s airway. While maintaining a calm environment is important, the nurse must first ensure the client’s airway is open and breathing is adequate.

Choice F reason: Placing the emergency cart at the bedside is a preparatory step that can be useful, but it is not the first action to take. The nurse should first activate the emergency or rapid response system to get immediate help. The emergency cart can be brought to the bedside by the responding team.