The depth of compression ratio for an adult is at least 2 inches which is 5 cm, all with a rate of 100-120 per minute. Techniques and Approach for Adults, Children and Infants. When placing the hands on the chest of an adult, two hands should be used. read more
Compression ventilation ratio for 1 rescuer adult CPR is 30 compressions to 2 ventilation's. read more
The compression-to-ventilation (or breaths) ratio for 2-rescuer child/infant CPR is 15:2. Compression and ventilation rates for 2-rescuer CPR in the presence of an advanced airway is to compress at a rate of at least 100 per minute, 1 breath every 6 to 8 seconds. read more