A nurse is planning on teaching a client who is scheduled for an intravenous pyelogram (IVP). Which of the following statements should the nurse include in the teaching?

Choice A reason: 0.9% sodium chloride, also known as normal saline, is not the best choice for interim fluid replacement when TPN is delayed. While it can maintain hydration and electrolyte balance, it does not provide the necessary calories that TPN supplies. TPN solutions are rich in dextrose, amino acids, and lipids, which are essential for patients who cannot receive nutrition through their gastrointestinal tract.

Choice B reason: Dextrose 5% in water (D5W) provides some calories but not enough to meet the nutritional needs of a patient who is dependent on TPN. D5W contains 5 grams of dextrose per 100 mL, providing 170 calories per liter. This is insufficient for patients who require high-calorie intake due to their inability to eat or absorb nutrients normally.

Choice C reason: Dextrose 10% in water (D10W) is the most appropriate choice for interim fluid replacement when TPN is delayed. D10W provides 10 grams of dextrose per 100 mL, offering 340 calories per liter. This higher concentration of dextrose helps to maintain the patient’s caloric intake and prevent hypoglycemia until the next TPN container is available.

Choice D reason: Lactated Ringer’s solution is primarily used for fluid and electrolyte replacement. It contains sodium, potassium, calcium, chloride, and lactate, but it does not provide the necessary calories that TPN supplies. Therefore, it is not suitable for maintaining the nutritional needs of a patient who is dependent on TPN.

Choice A reason:

The arterial blood gas (ABG) values of pH 7.26, HCO₃ 14, and PaCO₂ 30 indicate metabolic acidosis with partial respiratory compensation. Acute kidney injury (AKI) often leads to metabolic acidosis due to the kidneys’ inability to excrete acid and reabsorb bicarbonate. The low pH indicates acidosis, the low bicarbonate (HCO₃) reflects metabolic acidosis, and the low PaCO₂ shows that the respiratory system is trying to compensate by blowing off CO₂.

Choice B reason:

The ABG values of pH 7.49, HCO₃ 30, and PaCO₂ 40 indicate metabolic alkalosis. This condition is characterized by an elevated pH and bicarbonate level. Metabolic alkalosis is not typically associated with acute kidney injury. Instead, it can result from excessive bicarbonate intake, loss of gastric acid (e.g., vomiting), or diuretic use.

Choice C reason:

The ABG values of pH 7.26, HCO₃ 24, and PaCO₂ 46 suggest respiratory acidosis. The low pH indicates acidosis, but the normal bicarbonate level and elevated PaCO₂ point to a respiratory cause rather than a metabolic one. Respiratory acidosis occurs when the lungs cannot remove enough CO₂, leading to its accumulation. This is not a typical presentation of AKI.

Choice D reason:

The ABG values of pH 7.49, HCO₃ 24, and PaCO₂ 30 indicate respiratory alkalosis. The high pH and low PaCO₂ suggest that the patient is hyperventilating, leading to excessive CO₂ loss. This condition is not commonly associated with acute kidney injury, which more frequently causes metabolic acidosis.