The nurse is caring for a patient who had abdominal surgery yesterday and is receiving morphine through patient controlled analgesia (PCA). What action by the nurse is a priority?

Morphine is a potent opioid analgesic that can depress the respiratory system. Respiratory depression is a potential adverse effect of morphine, and it is essential for the nurse to monitor the patient's respiratory rate regularly to ensure adequate oxygenation and prevent respiratory complications.

By checking the respiratory rate, the nurse can assess if the patient is breathing adequately and detect any signs of respiratory depression. If the respiratory rate is significantly decreased or the patient shows signs of respiratory distress (e.g., shallow or irregular breathing), immediate intervention is necessary to address the situation promptly.

Acute renal failure is characterized by a sudden decline in kidney function, resulting in the inability of the kidneys to adequately filter waste products and maintain fluid and electrolyte balance. Monitoring urine output is essential in assessing kidney function and determining the severity of renal failure. A decrease in urine output or anuria may indicate worsening renal function and the need for immediate interventions.

Assessing electrolyte levels, such as sodium, potassium, calcium, and phosphorus, is crucial because renal failure can disrupt the balance of these electrolytes in the body. Imbalances can lead to complications such as electrolyte abnormalities, cardiac dysrhythmias, and neuromuscular disturbances. Prompt identification and management of electrolyte imbalances are essential in preventing further complications and supporting optimal patient outcomes.