Correct Answer: C

Rationale: Elevated serum creatinine levels indicate impaired kidney function. As kidney disease progresses, the kidneys are less able to filter waste products, leading to an increase in creatinine levels. Therefore, a high serum creatinine level of 2.5 mg/dL should be reported to the provider for further evaluation and management. Choices A, B, and D are within normal ranges and do not directly signify worsening kidney function in this context.

Correct Answer: A

Rationale: A glomerular filtration rate of 14 mL/minute indicates severe kidney dysfunction, necessitating hemodialysis. The other options, BUN of 16 mg/dL, serum magnesium of 1.8 mg/dL, and serum phosphorus of 4.0 mg/dL, are within normal ranges and do not serve as indications for hemodialysis.

Correct Answer: A

Rationale: The most crucial nursing action for a patient post-surgery is to monitor vital signs. Monitoring vital signs helps in detecting early signs of complications such as hemorrhage, shock, or infection. While monitoring the surgical site is important for assessing wound healing and signs of infection, it is secondary to monitoring vital signs. Checking blood pressure and oxygen saturation are also important, but they are components of monitoring vital signs.

Correct Answer: A

Rationale: The correct answer is hypokalemia. Loop diuretics can cause potassium depletion leading to hypokalemia, which is particularly concerning as it can result in cardiac arrhythmias. Hyponatremia (choice B) is not typically associated with loop diuretics. Hyperkalemia (choice C) is less common in patients on loop diuretics. Hypercalcemia (choice D) is not a typical electrolyte imbalance associated with loop diuretics.

Correct Answer: A

Rationale: The correct answer is to administer epinephrine. Epinephrine is the first-line treatment for a severe allergic reaction as it helps to constrict blood vessels, increase heart rate, and open airways, thereby improving breathing and circulation. Discontinuing the medication may not be sufficient to manage a severe allergic reaction as the allergen is already in the patient's system. Corticosteroids and antihistamines can be considered as complementary treatments but are not the primary immediate intervention required for a severe allergic reaction.