Why is it important to avoid creating positive pressure in the chest during CPR?

Avoiding positive pressure in the chest during CPR is crucial because it can lead to increased intracranial pressure and decrease venous return. When positive pressure is applied to the chest, such as through excessive ventilation with bag-mask ventilation, it can impede the natural flow of blood back to the heart. This is due to the fact that positive pressure can disrupt the negative intrathoracic pressure that typically aids in venous return during normal breathing and chest compressions.

Increased intracranial pressure can occur as a result of the elevated pressures in the thoracic cavity, which can affect cerebral blood flow and brain function, potentially leading to further complications. Maintaining effective venous return is essential for ensuring that blood is circulated effectively during CPR, thus maximizing the chances of successful resuscitation.

Other options may refer to valid concerns but do not capture the primary reason associated with avoiding positive pressure during chest compressions in the same context. Understanding these physiological implications helps reinforce the importance of proper technique in resuscitation practices.