Correct Answer: C

Rationale: The most important action for the nurse to take when a client has a positive MRSA and presents with a wound showing signs of infection is to initiate contact precautions. MRSA is highly contagious and placing the patient on contact precautions helps prevent the spread of the bacteria to others in the healthcare setting. (A) Forcing oral fluids will not directly address the MRSA infection. (B) Requesting a nutrition consult is not the priority in this situation. (D) Limiting visitors to immediate family only is not necessary as MRSA precautions are primarily focused on healthcare workers and close contacts who provide direct care.

Correct Answer: C

Rationale: The correct first action for the nurse to take when a patient complains of acute chest pain and dyspnea after the insertion of a centrally inserted IV catheter is to auscultate the patient's breath sounds. This is important to assess for any potential complications such as embolism or pneumothorax, which can present with such symptoms. Auscultation can provide immediate information on the patient's respiratory status and guide further interventions. Notifying the health care provider, offering reassurance, or administering morphine should only be considered after assessing the patient's condition through auscultation.

Correct Answer: B

Rationale: Daily weight is the most easily obtained and accurate means of assessing volume status. Skin turgor varies considerably with age and can be affected by various factors other than fluid balance. Presence of edema indicates excess fluid has moved into the interstitial space, which may not always be directly correlated with overall fluid balance. Hourly urine outputs, though important, do not provide a comprehensive picture of fluid balance as they do not consider fluid intake, insensible losses, or other sources of fluid loss.

Correct Answer: D

Rationale: Generalized weakness is a sign of hypokalemia, a potential side effect of potassium-wasting diuretics. By requesting a basic metabolic panel, the nurse can assess the patient's potassium levels. Facial muscle spasms are associated with hypocalcemia, not hypokalemia. Advising the patient to avoid orange juice, which is high in potassium, would be counterproductive if the patient is hypokalemic. Loose stools are typically seen in hyperkalemia, not hypokalemia.

Correct Answer: A

Rationale: The health care provider should be notified immediately. The patient has a history and manifestations consistent with hypermagnesemia. The nurse should check the chart for a recent serum magnesium level and make sure that blood is sent to the laboratory for immediate electrolyte and chemistry determinations. Dialysis should correct the high magnesium levels. The patient needs teaching about the risks of taking magnesium-containing antacids. Monitoring of potassium levels also is important for patients with renal failure, but the patient's current symptoms are not consistent with hyperkalemia.