- Explain the procedure and obtain consent.
- Provide a signal for the patient to stop the procedure.
- Sit the patient in a semi-upright position with the head supported with pillows and tilted neither backwards nor forwards.
- Examine the nostrils for deformity or obstructions to determine the best side for insertion.
- Measure the tubing from the bridge of the nose to the earlobe, then to the point halfway between the lower end of the sternum and the navel.