While cricoid pressure’s effectiveness at preventing passive regurgitation and aspiration during intubation is disputed, it may be effectively applied during bag-mask ventilation to prevent gastric insufflation of air in both adults and children.
The prevention of gastric inflation–a neglected benefit of cricoid pressure
Anaesth Intensive Care. 1988 May;16(2):139-43
The effect of cricoid pressure on preventing gastric insufflation in infants and children
Anesthesiology. 1993 Apr;78(4):652-6