Final answer:
Supplemental oxygen therapy is the most effective intervention in promoting adequate gas exchange for a COPD client admitted for pneumonia.
Step-by-step explanation:
The most effective intervention in promoting adequate gas exchange for a COPD client admitted for pneumonia is supplemental oxygen therapy.
Supplemental oxygen can help increase the oxygen level in the blood and improve the exchange of gases between the alveoli and the capillaries. It provides extra oxygen to compensate for the impaired lung function caused by COPD and pneumonia.
Other interventions that may also be used to promote adequate gas exchange include bronchodilator medications to help open up the airways, and breathing exercises to improve lung function.