RPN's into the intensive care unit

Hello to all,
I am heading a new research project on introducing RPN's into the intensive care unit of our hospital. I was wondering how many RPN's have worked in the unit or are currently working in an ICU. I am from Canada, so I think that the scope of practice differs from the US, but I was wondering if you could tell me what your job duties are, and how it has affected the ICU, positively or negatively in your opinions, having RPN's and RN's working together. Suggestions for ideas and or changes are welcome as well. Thanks all for your time!