The nurse is caring for a client with emphysema who is mildly dyspneic after ambulation. Which instruction should the nurse provide to the client to improve gas exchange?

Choice A reason: Drawing air in through the nose and exhaling slowly through pursed lips is a technique known as pursed-lip breathing. This method helps improve gas exchange by keeping the airways open longer during exhalation, which aids in the removal of trapped air and reduces dyspneal.Choice B reason: Increasing the breathing rate for a full 30 seconds is not recommended for clients with emphysema. Rapid breathing can lead to hyperventilation and increased work of breathing, which can exacerbate dyspneal.Choice C reason: Raising hands above the head to expand the diaphragm might help in some situations, but it is not as effective as pursed-lip breathing for improving gas exchange and reducing dyspneal in clients with emphysema.Choice D reason: Laying down on each side with knees bent and breathing from the abdomen is a relaxation technique that can help some clients, but it does not specifically address the need for improved gas exchange during episodes of dyspneal.