R.S. has smoked for many years and has developed chronic bronchitis a chronic obstructive pulmonary…

R.S. has smoked for many years and has developed chronic bronchitis a chronic obstructive pulmonary disease (COPD).
He also has a history of coronary artery disease and peripheral arterial vascular disease. His arterial blood gas (ABG) values are pH = 7.32 PaCO2 = 60 mm Hg PaO2= 50 mm Hg HCO3- = 30 mEq/L. His hematocrit is 52% with normal red cell indices. He is using an inhaled 2 agonist and Theophylline to manage his respiratory disease. At this clinic visit it is noted on a chest x-ray that R.S. has an area of consolidation in his right lower lobe that is thought to be consistent with pneumonia.Question: What is the rationale for treating R.S. With Theophylline and a B2 agonist?

 
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