2. Consent of friends is easily obtained.

3. No cutting: great rapidity.

4. No wound to heal.

5. Tube worn more easily than the tracheotomy tube.

6. Breathing through natural passages, so that warmth and moisture are added to the air.

7. Its earlier performance.

8. Its better results in children under five.

9. Recovery is quicker.

The practical disadvantages are:

1. Quite unsuitable except at special hospitals, as great dexterity and constant practice are necessary.