I don't know if it is just Arrow EZ IO, my county, or my company, but I feel like they are pushing for us to be more and more lenient with using IO when we cannot get an IV. Our protocol just says that IO should not be used for prophylaxis purposes and that you should be intending on using it if you do it. They make it seem like it is not a big deal, even in a conscious patient. They always bring up how it doesn't hurt until you just flush, but just slowly push Lidocaine, let it sit in the bone arrow, and then use it. My county/company is weird because they brought in the Arrow EZ IO people to teach us and those guys contradicted our protocols telling us it was crazy, which makes me go ugh. Arrow EZ IO recommends slowly pushing 40 mg Lidocaine IO over 2 minutes and letting it sit in the bone marrow before use. Our county's protocol says push 40 mg over 30-45 seconds and you're good to go, lol. I have never ever done a conscious IO ever. I also personally just don't like IOs. I feel like it's so hard to push medications into it, the whole humeral IO that they are now pushing is awkward with the arm position and I find difficult to do (I've never done it, I feel like I have a hard time finding the land mark other than it is easy to remember to point to the butt cheek on the other side), fluids start to backup in the chamber so it's not that useful if I decided to hang a medication drip, and I don't think the hospital ever tries to draw labs out of it. Usually the first thing the hospital does, if we don't have an IV or EJ, is they a line and draw labs from it. So on my cardiac arrests (our protocol prefers IO over IV in cardiac arrest...) or critical calls, IV or EJ is my preference. I get not every patient is going to be easy or worthwhile to search forever looking for a vein, but most patients seem easy enough. I don't get too many cardiac arrest, like one a month, and I have yet to use an IO on a single one. I think the IO is a great tool in a pinch, the studies shown to me (ehem, but the Arrow EZ IO guys) seem to show it does well administering fluids quickly when done humeral, I just feel like it is kind of overrated and more problematic compared to IV and EJs.