A nurse is caring for a client who has pneumonia and a prescription for oxygen therapy at 5 L/min via nasal cannula. Which of the following actions should the nurse take?

Choice A reason: Petroleum-based products are flammable and should not be used near oxygen sources. Instead, water-based lubricants are recommended to prevent nasal dryness safely. Choice B reason: Oxygen tubing should be secured to the client’s clothing or behind the ears, not the bed sheet. Securing it to the bed sheet risks dislodgement and interruption of oxygen delivery. Choice C reason: The nasal cannula should remain in place during meals unless contraindicated. Removing it can lead to hypoxia, especially in clients with pneumonia who have impaired gas exchange. Choice D reason: Oxygen delivered at 4 L/min or higher should be humidified to prevent drying of mucous membranes and airway irritation. Attaching a humidifier bottle helps maintain mucosal integrity and comfort.