There have been several methods of artificial respiration practiced in First Aid. Up to the II World War, Sylvester’s method was felt to be the best. During this war mouth-to-mouth (to-nose) method was discovered and found to be the best and easiest method to be used under most conditions.
Asphyxia of a severe degree is found along with unconsciousness. General causes are:
Begin to work immediately as every minute counts. Do not delay.
Treatment when not breathing.
Mouth-to-Mouth
Note: important