Of note, studies have been done looking at the flow rates of the devices in cadavers, and over 5 minutes under the same pressure-infusion parameters, the FAST1 infused 469 ml, the EZ-IO at a humeral site infused 286 ml, and the EZ-IO at a tibial site infused 154 ml. Given time, any of them will allow for fluid resuscitation, but in a situation where time is of the essence, consideration of the faster infusion times may be warranted.

Avoid FAST1 devices in casualties with significant chest injuries or who are small in stature.

EZ-IO kits can come with multiple needle sizes based on both the age and size of the casualty and the intended insertion site. And the needles can be inserted using a drill or they can be inserted manually using a twisting motion. The subsequent videos will explain some of these considerations in more detail.