How is the effectiveness of CPR evaluated?

The effectiveness of CPR is evaluated by observing the return of pulse, breathing, or responsiveness. This is crucial because these indicators directly reflect the restoration of vital signs that are essential for life. When CPR is performed, the primary goal is to maintain circulation and oxygenation until advanced medical help can take over or until the heart can resume its normal function.

The return of a pulse shows that blood is once again being circulated through the body, which is a key sign that the heart might be functioning adequately. Similarly, the presence of effective breathing indicates that the lungs are taking in air, allowing for oxygen exchange, which is critical for survival. Additionally, responsiveness can provide signs of neurological function returning, suggesting that the brain is receiving adequate oxygen.

Other options, such as measuring blood pressure before the procedure or using a stethoscope to assess heart sounds, are not practical or reliable methods for evaluating the immediate effectiveness of CPR during a cardiac arrest situation. Checking skin color and temperature can provide some context about circulation but are less direct indicators of the immediate effectiveness of CPR compared to assessing pulse, breathing, and responsiveness.