Combat Medic 68W: Field Craft 2 Practice Exam

When managing breathing for casualties with suspected head injuries, hyperventilation should be avoided because it can lead to a significant decrease in carbon dioxide levels in the blood. This condition, known as hypocapnia, can cause vasoconstriction in cerebral blood vessels, thereby diminishing cerebral blood flow and potentially exacerbating the injury.

In contrast, maintaining adequate ventilation while avoiding hyperventilation is crucial for ensuring sufficient oxygen delivery to the brain and preventing secondary insults. The focus should be on supporting normal respiratory function rather than inducing a state that may lead to further neurological damage.

This understanding emphasizes the importance of regulating breathing in head injury cases, where cerebral perfusion is paramount. Other forms of ventilation management, such as positive pressure ventilation or bag-mask ventilation, may be necessary to ensure adequate oxygen delivery, as long as they do not induce hyperventilation.