Compared to the current standard of IV (and perhaps intraosseous) line placement by ALS-level providers, EASI access could enable out-of-hospital responders (ALS as well as lower echelon providers) to achieve intravascular access in more patients, more quickly, more reliably, and with less pain. We thus plan to conduct the EASI Access study for out-of-hospital providers, as a mechanism to investigate whether EASI access can accrue the hypothesized advantages. The study will begin with ALS-level providers. The ultimate plan, should ALS provider EASI prove efficient, will be to assess whether simple placement of EASI access by non-ALS providers can extend the reach of advanced care providers in situations where need for IV access outstrips available resources.