When the rescuer is unwilling or unable to do the ventilations.
"The Canadian Red Cross recognizes that compression-only CPR is an acceptable alternative for those who are unwilling, unable, untrained, or are no longer able to perform full CPR. In some cases, compression-only CPR is the preferred method for members of the public who witness an adult suddenly collapse. The issue has recently emerged based on research published in the journal Circulation."
When a lay person with no CPR training is on the phone with 911 and the dispatcher is giving instructions to the lay rescuer
30:2
No; CPR starts with compressions and ends with breaths; 30 compressions : 2 breaths.
With 2 rescuers, compressions and ventilations should be done at a ratio of 15:2 for an infant or child.
It is the same for 1-rescuer CPR Adult, Child, and Infant: 2 ventilations to 30 compressions.
40
40
The recommended depth of chest compressions in adult CPR is 2 inches
3 compressions to 1 breath, or 90 compressions to 30 breaths on a per minute basis.
The rate for CPR chest compressions is 100 per minute; adult, child, and infant.
The recommended depth of chest compressions in adult CPR is 2 inches
What is the compressions to breath ratio for 1-rescuer on infant