The recommended ratio of compression to ventilation in CPR (cardiopulmonary resuscitation) varies depending on the age of the patient and whether the rescuer is performing single-rescuer or two-rescuer CPR.
For adult CPR, the recommended compression to ventilation ratio is 30:2. This means that after the rescuer confirms that the patient is unresponsive and not breathing normally, they should immediately start chest compressions by pushing hard and fast on the center of the chest at a rate of 100 to 120 compressions per minute. After every 30 compressions, the rescuer should give two breaths by tilting the patient’s head back, lifting their chin, and giving a breath that makes the chest rise.
For child CPR, the compression to ventilation ratio is also 30:2, unless the rescuer is using a device such as a bag-mask or advanced airway, in which case continuous compressions can be provided with ventilation given every 6 to 8 seconds.
For infant CPR, the compression to ventilation ratio is 30:2 if the rescuer is performing single-rescuer CPR or 15:2 if the rescuer is performing two-rescuer CPR. In two-rescuer CPR for infants, one rescuer provides compressions while the other provides breaths.
It is important to note that these ratios are guidelines, and rescuers should adjust the ratio based on the patient’s response and the rescuer’s skill level and comfort. The goal of CPR is to maintain blood flow and oxygenation to the vital organs, and the compression to ventilation ratio is a tool to help achieve this goal.