What is the appropriate technique for single-provider CPR on an adult?

The recommended technique for single-provider CPR on an adult is to perform 30 chest compressions followed by 2 ventilations. This sequence is critical because effective chest compressions are the first priority in CPR, as they help maintain blood flow to vital organs, particularly the brain and heart.

After delivering 30 compressions, giving 2 ventilations allows for oxygen to be introduced into the lungs, supporting the needs of the body while circulation is being maintained. This rhythm of compressions followed by ventilations has been established to enhance the chances of survival and improve outcomes in cases of cardiac arrest.

While there are alternative approaches such as continuous compressions without ventilations, these are generally recommended for specific scenarios or types of rescuer situations, and not for a single provider performing CPR on an adult. Thus, the alternating pattern of 30 compressions and 2 ventilations is the established guideline for single-provider CPR, making it the correct answer.