Here is a link to the manufacturer's website for EZ-IO information.  There are links to download the EZ-IO App, view videos, and evaluate literature:

EZ-IO Website

Here is an image for proper positioning of the Upper Extremity after completing EZ-IO, in order to prevent the scapula from dislodging the EZ-IO with Upper Extremity Abduction > 90 degrees:

EZ-IO Upper Extremity Positioning After Placement