For a casualty without a radial pulse, which IV method is standard?

• A. Direct line IV
• B. Saline lock
• C. IV push
• D. Intraosseous

Answer: (A)

In a casualty without a radial pulse, the quick, reliable way to gain vascular access is intraosseous access. When someone is in shock, veins constrict and can collapse, making a peripheral IV hard or slow to establish. An IO line goes directly into the bone marrow, providing fast, reliable access to circulate fluids and medications without waiting for a vein to become usable. This is why intraosseous access is the standard choice in urgent field care scenarios. Once established, you can start fluids or meds promptly, which is crucial for improving perfusion and outcomes.