A patient requires 250 mL of D5W to be infused over 4 hours with a microdrip set that has a drop factor of 60 gtt/mL. What is the required drip rate in gtt/min?

A. pH 7.50, PCO2 35 mm Hg, HCO3 24 mEq/L:This result demonstrates an alkaline pH greater than 7.45, which defines alkalosis rather than acidosis. The PCO2is at the lower limit of normal, suggesting a respiratory cause for the alkalinity. It is the physiological opposite of the state seen in chronic obstructive pulmonary disease.

B. pH 7.40, PCO2 40 mm Hg, HCO3 24 mEq/L:These values represent a perfectly balanced acid-base status within normal reference ranges. The pH is neutral, and the carbon dioxide and bicarbonate levels indicate effective alveolar ventilation and renal compensation. There is no evidence of respiratory failure or acidotic stress.

C. pH 7.30, PCO2 50 mm Hg, HCO3 24 mEq/L:An arterial pH below 7.35 confirms acidosis, while a PCO2 above 45 mm Hg indicates alveolar hypoventilation. In COPD, the inability to expire carbon dioxide leads to its accumulation and the subsequent formation of carbonic acid. This specifically matches the criteria for acute respiratory acidosis.

D. pH 7.35, PCO2 40 mm Hg, HCO3 22 mEq/L:This pH is at the lower limit of normal, and the carbon dioxide level is within the expected range. The bicarbonate is slightly low, which would be more indicative of a metabolic process rather than respiratory retention. It does not reflect the hypercapnia typical of advanced COPD.

A. Document the patient's pain and notify the physician:While documentation and communication are necessary, the nurse must first gather objective assessment data to provide a meaningful report. Notifying the provider without a physical assessment prevents the identification of acute surgical complications. Physical assessment must always precede notification in the nursing process.

B. Encourage the patient to use non-pharmacologic methods like relaxation:While relaxation is a helpful adjunct, it is insufficient as a primary intervention for "severe" acute postoperative pain. Using only non-pharmacologic methods ignores the potential for serious surgical complications that require medical attention. This approach delays necessary diagnostic evaluation of the patient's distress.

C. Administer a stronger dose of pain medication:Administering more analgesia without an assessment is dangerous and could mask the symptoms of a worsening condition like hemorrhage or dehiscence. It violates safe practice standards by treating a symptom without investigating the underlying cause. Nurses cannot independently increase doses beyond prescribed limits.

D. Perform a focused assessment of the surgical site and evaluate for any complications:Severe pain that is refractory to standard analgesics can be an early warning sign of hematoma, infection, or internal injury. The nurse must inspect the dressing, check for distension, and monitor vital signs to rule out emergencies. Assessment is the critical first step in clinical decision-making.