A client diagnosed with a pulmonary embolism is placed on a continuous Heparin infusion. A nurse should notify the health care provider for which of the following findings?

A. Conduct a study about the time and money costs of implementing the change. While analyzing costs and time efficiency is important for evaluating resource utilization, it does not directly measure the effectiveness of the changes in reducing medication errors. The primary goal of quality improvement is to assess patient safety outcomes rather than financial impact alone.
B. Establish a benchmark to identify a standard of performance. Setting benchmarks is a useful strategy for quality control, but it is a preliminary step in the evaluation process. Benchmarks provide a target for improvement, but they do not measure whether the specific changes implemented have led to a reduction in medication errors.
C. Compare the number of medication errors before and after the action was implemented. The most effective way to evaluate the success of the changes is to analyze pre- and post-intervention data. Comparing the frequency of medication errors before and after the quality improvement measures allows for an objective assessment of whether the interventions have led to a meaningful reduction in errors.
D. Provide the staff with a questionnaire to quantify staff satisfaction with the changes. Staff feedback is valuable for assessing workflow and morale, but it does not directly measure the effectiveness of the intervention in reducing medication errors. A reduction in actual error rates provides a more concrete evaluation of the intervention’s success.

A. Increased arterial oxygen: Clients with COPD typically experience chronic hypoxemia due to alveolar destruction, airway inflammation, and mucus production, which impair gas exchange. Rather than increased oxygen levels, they often have a decreased PaO₂, requiring supplemental oxygen therapy. However, excessive oxygen administration can suppress their respiratory drive, worsening CO₂ retention.
B. Increased pH: COPD is associated with respiratory acidosis due to chronic CO₂ retention from inadequate alveolar ventilation. While the kidneys compensate by increasing bicarbonate retention, the pH usually remains low or near normal in chronic cases rather than becoming elevated. A higher pH would indicate alkalosis, which is not typical in COPD unless there is an additional metabolic disturbance.
C. Increased carbon dioxide: COPD causes airway obstruction and reduced alveolar ventilation, leading to CO₂ retention (hypercapnia). As CO₂ accumulates in the blood, it lowers the pH, resulting in respiratory acidosis. Chronic hypercapnia is a hallmark of advanced COPD, and in response, the kidneys retain bicarbonate to partially compensate, stabilizing the pH over time but leaving PaCO₂ elevated.
D. Decreased alveolar function: While COPD does lead to progressive alveolar damage and reduced gas exchange, this is a structural and functional change rather than a specific abnormality seen in arterial blood gases. The primary ABG finding in COPD is hypercapnia, which reflects inadequate ventilation and CO₂ retention rather than just decreased alveolar function alone.