Nursing development on ICU

I am a RN in training for intensive care in the Netherlands (Europe). Because of this training of one year and a half, I have to write a paper. I have choosen the subject NDU on ICU. NDU stands for nursing development unit (for nursing in general). This concept is developed in UK, reading literature about it made me think that somewhere else in the world NDU is known and adopted too. I am interested in ICU's that has adopted such a thing like NDU, how it suits, what surplus value it gives etc.
I hope someone will respond (please, please please).