What kind of pressure should be used when providing chest compressions during CPR?

When performing chest compressions during CPR, the key is to apply firm, consistent pressure to the center of the person's chest. This firm pressure is necessary to effectively compress the heart and promote blood circulation, which is critical for delivering oxygen to vital organs during cardiac arrest.

Using firm pressure helps ensure that the compressions are deep enough to create sufficient blood flow. The recommended depth for adult chest compressions is about two inches (5 cm), and it is important to allow the chest to fully recoil between compressions to maximize blood flow. Consistency in the rhythm and pressure of compressions is also vital for maintaining circulation.

The other options do not provide the necessary pressure or technique required for effective CPR. Light pressure would not compress the chest adequately, and moderate pressure might not be sufficient to achieve the recommended depth of compressions. Relying solely on body weight might also lead to inconsistent compressions, as it could vary depending on the position and situation of the rescuer. Therefore, the emphasis on firm, consistent pressure is crucial for generating effective blood flow during CPR.