Administering Oxygen by Nasal Cannula

Essential equipment includes a flow meter to control oxygen rate, a humidifier filled with sterile distilled water to prevent mucous membrane dryness, nasal cannula tubing to deliver oxygen, gauze pads to cushion tubing over the ears, and personal protective equipment to protect the healthcare provider. Gathering all equipment near the patient's bed before starting ensures efficiency and streamlines the procedure.

A nasal cannula is a lightweight tube with two prongs inserted into the nostrils, connected to an oxygen source via tubing. It delivers low to medium oxygen concentrations up to 6 L/min, allowing patients to move, talk, cough, and eat without interrupting oxygen flow. Flow rates exceeding 4 L/min may cause air swallowing and irritation of nasal and pharyngeal mucosa.

Humidification adds moisture to oxygen, preventing dryness and irritation of the nasal and pharyngeal mucosa. The humidifier is filled with sterile distilled water and connected to the oxygen setup before delivery. Without humidification, prolonged oxygen therapy can cause discomfort and tissue damage to the patient's airways.

Insert the prongs gently into the patient's nostrils, then position the tubing over and behind each ear or around the head for stability. Adjust the cannula to fit snugly but comfortably against the skin to prevent pressure irritation. Use gauze pads at the ears if needed for additional cushioning and comfort during extended use.

Identify the patient by checking the ID band and bed number to prevent errors. Close curtains and doors to ensure privacy and maintain confidentiality. Explain the procedure, its purpose, and safety precautions such as no-smoking signs to alleviate anxiety and encourage cooperation. These steps establish trust and prepare the patient for oxygen therapy.

Encourage the patient to breathe through their nose with their mouth closed for optimal oxygen delivery and absorption. Nasal breathing ensures oxygen reaches the lungs efficiently rather than being bypassed through mouth breathing. Provide clear breathing instructions and visual cues to help patients maintain proper technique throughout therapy.

Use pulse oximetry and visual observation to assess the patient's respiratory status and evaluate oxygen therapy effectiveness. Monitor for signs of respiratory distress and regularly inspect the nostrils for irritation or bleeding. Continual assessment ensures the therapy is working and allows for prompt intervention if complications arise.