Based on the search results, an EZ IO is a medical device used for intraosseous vascular access. It is a needle that is inserted into the bone marrow to provide access to the vascular system when traditional methods of vascular access are difficult or impossible to obtain. The EZ IO system is manufactured by Teleflex. The device can be inserted manually or with a drill-inserted device. The placement of an EZ IO needle is demonstrated in a video by Dr. Jeff Mason.