A nurse is caring for a client who is receiving oxygen therapy via a nasal cannula. The nurse explains to the client that this method of oxygen delivery does which of the following?

Choice A reason: A nasal cannula delivers low-flow oxygen (2-6 L/min, 24-44% FiO2), suitable for patients needing minimal supplemental oxygen. It provides low concentrations to maintain adequate oxygenation without precise control, ideal for stable patients with mild hypoxemia, like those with chronic lung conditions. Choice B reason: A nasal cannula does not deliver a constant rate of specific oxygen concentration. Unlike Venturi masks, it provides variable FiO2 based on the patient’s breathing pattern, making this statement incorrect for describing the cannula’s low-flow, non-precise oxygen delivery. Choice C reason: A nasal cannula does not significantly restrict eating, speaking, or drinking, as it sits below the nose, allowing oral functions. This contrasts with masks that cover the mouth, making this statement incorrect for the cannula’s minimally invasive design. Choice D reason: A nasal cannula does not deliver high-concentration oxygen, which requires devices like nonrebreather masks (up to 90-100% FiO2). Its low-flow delivery (24-44% FiO2) is insufficient for high oxygen needs, making this choice incorrect for its capabilities.