In pediatric advanced life suppo intraosseous access for drug/fluid administration is recommended for

Intraosseous infusion (IO) is the process of injecting directly into the marrow of a bone to provide a non-collapsible entry point into the systemic venous system. This technique is used in emergency situations to provide fluids and medication when intravenous access is not available or not feasible. A comparison of intravenous (IV), intramuscular (IM), and intraosseous (IO) routes of administration concluded that the intraosseous route is demonstrably superior to intramuscular and comparable to intravenous administration (in delivering paediatric anesthetic drugs). Due to the rapid advance and adoption of superior intraosseous access technology, IO access has now become the preferred method of establishing vascular access for patients in whom traditional access is difficult or impossible. Reference: GHAI Essential pediatrics, 8th edition