Intraosseous injection

In medicine, intraosseous injection is the method of injecting a drug or other substance directly into the bone marrow cavity of pediatric (and occasionally adult) patients through an apparatus known as a free-flowing intraosseous infusion system. Agents infused by this method are thought to circulate via the medullary cavity of the bone. The length of time time from injection to entry into the systemic circulation is thought to equal that of the intravenous route.