A client with chronic obstructive pulmonary disease (COPD) is admitted with acute exacerbation and respiratory distress. Which finding requires immediate intervention by the nurse?

Choice A reason: Oxygen saturation of 88% in COPD is low but may be baseline for severe disease. It warrants oxygen therapy but is not the most urgent finding. Arterial pH of 7.28 indicates acute respiratory acidosis, a life-threatening complication requiring immediate ventilatory support to correct CO2 retention and acid-base imbalance. Choice B reason: A respiratory rate of 26 breaths/min indicates tachypnea, common in COPD exacerbation, but is not immediately life-threatening. It reflects respiratory effort to compensate for hypoxia. Arterial pH of 7.28 suggests acute acidosis from CO2 retention, requiring urgent intervention like non-invasive ventilation, making tachypnea a lower priority. Choice C reason: Accessory muscle use indicates increased work of breathing in COPD exacerbation, signaling distress but not immediate danger. It reflects compensatory efforts for airway obstruction. Arterial pH of 7.28 indicates severe acidosis, a life-threatening condition requiring urgent ventilatory support, making muscle use less critical in this scenario. Choice D reason: Arterial pH of 7.28 in a COPD exacerbation indicates acute respiratory acidosis due to CO2 retention from hypoventilation. This life-threatening imbalance can lead to coma or cardiac arrest if uncorrected. Immediate intervention, such as non-invasive ventilation, is needed to restore pH and CO2 levels, making this the priority finding.