There are a variety of terms that research enterprises use for nurses: research nurses, research nurse coordinators, research coordinator, clinical trial coordinator, etc.
Go to LinkedIn for some help in finding research positions. They show up on my newsfeed on a daily basis. Get connected with headhunters and research recruiters. Aerotek and Medix are two recruitment agencies that look for nurses for research roles.
Google these research companies: PPD, PRA, Quintiles, INC Research, Pfizer, Parexel, ICON, Covance.