Before revision: It is recommended to start the cardiopulmonary resuscitation (CPR) with 2 initial rescue breaths (pinching the victim's nose and blowing air mouth-to-mouth), because of the lack of oxygen and the possibility of water in the airway .
After revision: It is recommended to start the cardiopulmonary resuscitation (CPR) with 5 initial rescue breaths (pinching the victim's nose and blowing air mouth-to-mouth), as the initial ventilation may be difficult because of, which can interfere with effective alveolar inflation water in the airway .