What is the expected outcome of using a bronchodilator in COPD patients?

Using a bronchodilator in patients with Chronic Obstructive Pulmonary Disease (COPD) is primarily aimed at improving airflow by relaxing the muscles around the airways. This relaxation leads to the widening of the airways, allowing for increased airflow into and out of the lungs. As a result, there is an expected outcome of increased lung volume, specifically the volume of air that can be effectively exchanged during breathing. This improved lung volume can ultimately enhance the patient's ability to breathe, reduce symptoms of dyspnea (shortness of breath), and improve overall quality of life.

In contrast, the other options do not directly relate to the primary actions of bronchodilators in the context of COPD treatment. Normalizing blood pressure is more associated with cardiovascular medications, while decreasing peripheral edema and improving fistula patency are not relevant to the primary effects of bronchodilators in respiratory therapy. Therefore, the correct choice emphasizes the significant goal of bronchodilators in facilitating better lung function for COPD patients.