Rules engine for clinical alerts

We need a rules engine where we can take physician and nursing protocols and write conditions with if/else/while conditions that will alert nurses and doctors when certain conditions are met. This would be a customizable application based on medical staff approved protocols. It would collect certain values from input sources, ie lab results, vitals, etc. and challenge the rules engine and alert via text, email, visible, audible, etc. I already have one of these methods built for sepsis potential patients and it works great. Would be happy to share the code and data links.