Simulaids Intraosseous Leg on Stand for use with Adult STAT Simulators. Intraosseous access to the proximal tibia is offered with the I/O Leg for STAT Patient Simulators. Use the I/O Leg to enhance training and understanding of procedures associated with B.I.G.™ and EZ-IO™ devices. This I/O leg is not fluid capable and no blood source is accessible through the injection site. I/O Bone insert puncture sites and knee skin replacements are available.