What is the recommended route for obtaining vascular access when IV access is not feasible?

• A. Intraosseous access
• B. Central venous catheter
• C. Umbilical venous catheter
• D. Intrathecal access

Answer: (A)

When IV access isn’t quickly obtainable in a trauma resuscitation, intraosseous access is the fastest, most reliable way to get vascular access. Placing an IO needle into the bone marrow cavity creates a noncollapsible channel that delivers fluids, medications, and even blood products directly into the circulation in seconds, which is crucial to start resuscitation without delaying therapy.

Common sites are chosen based on age and situation (for example, the proximal tibia or distal femur in many patients, with humeral head access used in adults when appropriate). Because time matters in shock or critical injury, an IO line is often placed after only a brief attempt at IV access if IV remains unattainable within a short window.

IO access is intended for rapid, emergency resuscitation and can be used for most resuscitative needs, including crystalloids, certain medications, and blood products, with careful flushing to maintain patency. Once IV access is secured, the IO line is usually removed from later use, though it can remain if needed for short-term access.

Contraindications include infection at the insertion site, fracture or pathology of the bone at the site, significant bone disease, or previous IO attempts at the same site that limit access. Potential complications are relatively uncommon but can include infiltration, extravasation, infection, or damage to adjacent structures, so the line should be monitored and removed as soon as IV access is established or after a defined period.

Other options like central venous catheters take longer to obtain and are more invasive in an emergent setting; umbilical venous catheter is specific to neonates, and intrathecal access is not used for systemic resuscitation.