Final answer:
A client with COPD requires a nasal cannula for low flow oxygen administration. Insufficient ventilation results in the constriction of pulmonary arterioles to redirect blood to well-ventilated alveoli. The type of oxygen delivery system used depends on the patient's needs and the healthcare provider's recommendations.
Step-by-step explanation:
A client with chronic obstructive pulmonary disease (COPD) requires low-flow oxygen. The appropriate method for administering low-flow oxygen in this case would be a nasal cannula. This is because a nasal cannula allows for a variable amount of oxygen to be delivered and it is well-tolerated for long periods, which is beneficial for COPD patients who may require continuous oxygen therapy. When ventilation is not sufficient, as in some cases of COPD, the partial pressure of oxygen in the alveoli decreases. The body responds to this by constricting the pulmonary arterioles serving poorly ventilated alveoli to redirect blood flow to better-ventilated areas, ensuring more effective oxygenation of the blood. It is important to note that the use of different oxygen delivery systems, like the Venturi mask or simple oxygen mask, would depend on the specific needs and condition of the patient, as well as healthcare provider recommendations.