?:definition
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Nasal catheters designed for delivery of oxygen into either of the nasal cavities. These catheters typically consist of a soft plastic tube with an internal diameter of 3 to 6 mm (l/8 to 1/4 inch); the distal tip is foam-collared and inserted into a nostril. Oxygen-supply nasal catheters are mostly used for short-term oxygen administration (e.g., in the immediate postoperative period); these catheters can be used in patients with a nasogastric tube in situ in the other nostril.
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