What is the ratio of cardiac compression to artificial respiration

The ratio of cardiac compression to artificial respiration is 30:2, meaning that for 30 cardiac compressions, 2 artificial respirations are required, which is the standard of operation for single-person cardiopulmonary resuscitation.
At the same time in the cardiopulmonary resuscitation, need to master the correct way, such as in the cardiac compression, need to maintain the frequency of 100 to 120 times per minute, in the artificial respiration, should pay attention to the opening of the airway, at the same time to the mouth to affect the artificial respiration of the removal of foreign bodies, such as dentures and so on.
At the same time, artificial respiration needs to be carried out mouth-to-mouth, to ensure that artificial respiration of the object of the thorax with the respiratory augmentation, that is, effective artificial respiration, it is recommended to carry out standardized cardiopulmonary resuscitation learning before resuscitation, so as to avoid improper operation to affect the timing of treatment, etc..