Which condition(s) would cause the nurse to hold a PRN order for magnesium hydroxide (Milk of Magnesia)?

Choice A reason:
Amphotericin B is known to cause infusion reactions, including fever, chills, and rigors. These reactions are common and expected when administering this medication. Therefore, the statement that there is an infusion reaction to Amphotericin B is correct and does not indicate a need for further teaching.
Choice B reason:
This choice is incorrect because infusions of Amphotericin B should not be administered rapidly. Rapid infusion can increase the risk of severe side effects and adverse reactions. The drug should be administered slowly to minimize these risks. Thus, this statement indicates a need for further teaching.
Choice C reason:
Rotating the IV site frequently or using a larger vein, such as a central line, is a standard practice to reduce the risk of phlebitis, a common complication of Amphotericin B treatment. This statement is correct and does not indicate a need for further teaching.
Choice D reason:
Amphotericin B is indeed used for the treatment of systemic fungal infections. This statement is factually accurate and does not suggest any misunderstanding on the part of the nursing student. Therefore, it does not indicate a need for further teaching.

Choice A reason:

True is the correct answer. Cardiac cells can endure ischemic conditions for approximately 20 minutes before irreversible injury occurs. Beyond this period, the lack of oxygen and nutrients leads to cell death and permanent damage to the heart tissue. This understanding is crucial in acute cardiac care, where timely intervention can prevent irreversible damage.

Choice B reason:

False is incorrect because it does not align with the known tolerance period of cardiac cells to ischemic conditions. The 20-minute window is critical for initiating interventions that can save heart tissue from permanent damage.