Sorry, I meant EtO= Ethylene oxide.
Electron beam sterilization (e-beam sterilization) is a commercially successful technology for sterilizing a variety of disposable medical devices with a wide range of densities.
The e-beam inactivates microorganisms either by causing microbial death as a direct effect of the destruction of a vital molecule or by an indirect chemical reaction. This is the same mechanism as in gamma irradiation, and the dose required is the same.
http://www.ebeamservices.com/steriliz.htm
As with any sterilant in a dialyzer, it needs to be flushed thoroughly (not just recirculated) with an entire bag of saline (1,000 cc).
Wow if they ever reuse here .. that is the type I would want. Sounds safest.