A nurse is caring for a client in a critical care unit who suffered a knife wound to the chest. The nurse suspects the client is developing cardiac tamponade. Which of the following assessment findings should the nurse identify as supporting this suspicion?

First, the nurse should open the airway using a jaw-thrust maneuver (C) to ensure it is not obstructed. Next, they should determine the effectiveness of ventilatory efforts (B), as breathing is critical and any compromise must be addressed immediately. Following this, establishing IV access (D) is important for fluid resuscitation and medication administration. The nurse should then perform a Glasgow Coma Scale assessment (E) to determine the level of consciousness and neurological function. Lastly, removing clothing for a thorough assessment (A) is essential, but only after the critical steps concerning airway, breathing, circulation, and disability have been addressed.

B Metformin is an oral antidiabetic medication commonly used to treat type 2 diabetes. There is a potential risk of lactic acidosis when metformin is used in conjunction with contrast material, particularly in patients with underlying renal impairment. Contrast-induced nephropathy can exacerbate renal dysfunction, leading to increased levels of metformin and potentially increasing the risk of lactic acidosis. Therefore, metformin use before or after contrast administration should be carefully monitored, and in some cases, temporarily discontinued to reduce the risk of lactic acidosis.

A Atorvastatin is a statin medication commonly used to lower cholesterol levels. It does not have a direct interaction with contrast material used in cardiac catheterization. Therefore, it does not place the client at risk for acute kidney injury related to contrast-induced nephropathy (CIN).

C Carvedilol is a beta-blocker medication used to treat high blood pressure and heart failure. It does not have a direct interaction with contrast material used in cardiac catheterization. Therefore, it does not place the client at risk for acute kidney injury related to contrast-induced nephropathy (CIN).

D Nitroglycerin is a medication commonly used to relieve chest pain (angina) in patients with coronary artery disease. It does not have a direct interaction with contrast material used in cardiac catheterization. Therefore, it does not place the client at risk for acute kidney injury related to contrast- induced nephropathy (CIN).