Final answer:
The compression ventilation ratio in an adult is 30:2, meaning 30 compressions followed by 2 ventilations.
Step-by-step explanation:
The compression ventilation ratio in an adult is 30:2. This means there should be 30 compressions followed by 2 ventilations. For example, in CPR (cardiopulmonary resuscitation), you would perform 30 compressions (pushes on the chest) followed by 2 ventilations (rescue breaths). This ratio helps maintain blood flow to the vital organs while also providing oxygen to the patient. Remember, it is important to follow the guidelines provided by reputable healthcare organizations, such as the American Heart Association, for the most up-to-date and accurate information.