Before using a disposable nasal oxygen tube, it is necessary to check the packaging for completeness and distinguish between the double nose end and the oxygen receiving end after removal. Connect the oxygen receiving end tightly to the central oxygen supply device or oxygen cylinder pressure reducing valve, and adjust the appropriate flow rate (according to medical advice). Gently insert both nasal tips into the patient's nostrils, extending along both sides of the nose to the appropriate depth, ensuring that the hose naturally fits the face without twisting. Use adhesive tape to assist in fixation behind the ears or cheeks to avoid slipping.During use, it is necessary to observe whether the patient's breathing is smooth, whether there is holding or discomfort, and regularly check the position and patency of the nasal oxygen tube to prevent folding and blockage. Discard immediately after a single use and avoid repeated disinfection to prevent cross infection. Pay attention to gentle movements throughout the operation, protect the nasal mucosa, and especially strengthen care for the elderly, children, or those with unclear consciousness to ensure safe and effective oxygen supply.