How do chest compressions affect blood flow during CPR?

During CPR, chest compressions play a vital role in maintaining blood flow to the brain and vital organs. When compressions are applied to the chest, they create pressure in the thoracic cavity, which effectively helps to pump blood out of the heart and into the circulatory system. This mechanical action mimics the heart's pumping function, allowing blood to circulate, which is crucial for delivering oxygen and nutrients to the brain and other essential organs.

By compressing the chest, rescue personnel can generate enough pressure to push the blood towards the brain and vital organs, even in the absence of a normal heartbeat. Maintaining this blood flow is fundamental to preserving organ function and increasing the chances of survival until further medical help can be provided. Through effective chest compressions during CPR, the likelihood of brain injury from lack of oxygen is reduced, highlighting the importance of this technique in emergencies.