In the year 2008, resuscitation councils published updated consensual advisory statements that are based on latest scientific evidence and reappraised the role of mouth-to-mouth ventilation in Basic Life Support. The new Guidelines define conditions when continuous chest compressions without breathing could be effectively applied in adult patients.
Compression-only resuscitation is preferred approach in witnessed non-respiratory cardiac arrest if bystanders are not willing or unable to give mouth-to-mouth breathing or if have not been trained well in cardiopulmonary resuscitation.