What can happen if air enters a blood vessel in relation to neck injuries?

When air enters a blood vessel, a condition known as air embolism can occur, particularly in cases of neck injuries where the veins are exposed or compromised. This phenomenon is dangerous because the air bubbles can travel through the bloodstream and lodge in important areas such as the brain or heart. If air bubbles block blood flow to the brain, it can lead to a stroke, disrupting the delivery of oxygen and nutrients necessary for brain function. Similarly, if the air embolism affects the heart, it could potentially cause a heart attack due to reduced blood flow to cardiac tissues. Understanding the risks associated with air entering the vascular system is crucial for first responders, especially in situations involving neck trauma.