Practice Quiz

NREMT Paramedic Trauma Exam Prep

Category - Paramedic Trauma

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What role does the adventitia tunic play in traumatic aortic disruption?
  1. Protects the aorta and prevents complete tear
  2. Tearing unevenly, causing problems for surgical repair
  3. Promoting clotting, causing minor tears to plug readily
  4. Ballooning with increase in blood, causing pressure on the heart and lungs.
Explanation
Answer: A- The adventitia tunic is the protective outer layer of blood vessels and arteries. It is composed of collagen and, in arteries, has an external elastic lamina, which makes it resistant to tears, even in normal circumstances.

This protective layer helps prevent small tears from becoming worse. Additionally, the collagen anchors the aorta to nearby organs, adding another level of stability during blunt force trauma/impact.
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