What is the role of intraosseous access in trauma?

• A. Rapid vascular access when IV access is difficult or impossible, especially in children.
• B. Long-term venous access.
• C. Central venous catheter placement for long-term therapy.
• D. For arterial blood gas sampling only.

Answer: (A)

Intraosseous access is used because it provides rapid vascular access when IV access is difficult or impossible, which is common in trauma, especially with children. When veins collapse or are hard to find due to shock, edema, or is difficult to access quickly, inserting a needle into the bone marrow gives a reliable route to deliver fluids, blood products, and medications rapidly. This makes it a critical bridge to resuscitation, buying time until a peripheral IV or central venous access can be established. It’s intended as a temporary solution for urgent needs, not for long-term venous access or routine central line placement. Arterial blood gas sampling isn’t the primary role, though blood can sometimes be drawn from the IO site in certain situations.