A nasal cannula is the most common way to receive oxygen therapy: two soft prongs rest just inside the nostrils, the tube loops over the ears, and an adjustable slide keeps everything secure while you move, talk, eat and sleep. This adult cannula has a 2.1 m (7 ft) supply tube – the standard length for users who stay near their concentrator or cylinder. If you move around your home while on oxygen, choose the 4.5 m or 7.6 m version, or connect oxygen extension tubing. Replacement guide: cannulas are single-patient consumables. Replace every 2–4 weeks with daily use, after any illness, or as soon as the tubing discolours, stiffens or the prongs lose their shape.
