A prescribed amount of oxygen s needed for a patient with COPD to prevent:

Cardiac arrest related to increased partial pressure of carbon dioxide in arterial blood (PaCO2)Circulatory overload due to hypervolemiaRespiratory excitement Inhibition of the respiratory hypoxic stimulus

Explanation.

Delivery of more than 2 liters of oxygen per minute to a patient with chronic obstructive pulmonary disease (COPD), who is usually in a state of compensated respiratory acidosis (retaining carbon dioxide (CO2)), can inhibit the hypoxic stimulus for respiration. An increased partial pressure of carbon dioxide in arterial blood (PACO2) would not initially result in cardiac arrest. Circulatory overload and respiratory excitement have no relevance to the question.