A nurse at a mental health clinic is caring for four clients. The nurse should recognize that which of the following clients is using dissociation as a defense mechanism?

- A. Correct. The nurse should initiate continuous cardiac monitoring because a magnesium level of 2.7 mEq/L indicates hypermagnesemia, which can cause cardiac dysrhythmias, hypotension, and bradycardia.

- B. Incorrect. The nurse should not administer potassium chloride to a client who has hypermagnesemia because it can worsen the condition by increasing the intracellular magnesium level and decreasing the serum calcium level.

- C. Incorrect. The nurse should not provide a diet rich in legumes, nuts, and green vegetables to a client who has hypermagnesemia because these foods are high in magnesium and can increase the serum magnesium level.

- D. Incorrect. The nurse should not monitor the client for tetany because tetany is a sign of hypomagnesemia, not hypermagnesemia. Hypomagnesemia can cause neuromuscular excitability, muscle spasms, and positive Chvostek's and Trousseau's signs

Choice A rationale:

Hanging the transfusion with dextrose 5% in 0.9% sodium chloride is incorrect. Packed red blood cells (PRBCs) are transfused with normal saline (0.9% sodium chloride) and not with dextrose-containing solutions. Using dextrose can cause the red blood cells to hemolyze.

Choice B rationale:

Infusing the transfusion over 5 hours is incorrect. PRBC transfusions are typically administered over 2-4 hours, not 5 hours. Infusing the blood too slowly may cause the patient discomfort and may also increase the risk of bacterial growth in the blood product.

Choice C rationale:

Using a 20-gauge IV catheter to transfuse the blood is incorrect. While a 20-gauge IV catheter is suitable for most blood transfusions, it may not be appropriate for older adults or patients with fragile veins. A smaller gauge, such as 22 or 24, might be more suitable to prevent phlebitis and ensure a steady flow without damaging the blood cells.

Choice D rationale:

Monitoring vital signs every hour throughout the transfusion is the correct action. During a blood transfusion, it's crucial to monitor the patient's vital signs frequently to detect any adverse reactions promptly. Vital signs, including blood pressure, heart rate, respiratory rate, and temperature, should be assessed before the transfusion, 15 minutes after starting the transfusion, and then hourly thereafter. This vigilant monitoring helps in identifying potential transfusion reactions, such as fever, chills, or hypotension, allowing for immediate intervention if needed.