@Pitanity @nursingdean Biomedical Engineering (BME) is better thought of an addition layer of biology, chemistry, physiology, medicine, etc. on top of the "traditional" disciplines. (Or in your case nursing as well.) So which of the traditional areas are you most interested in? Then with some foundational work in that you can layer on your health care training.
As an example, I started out in electrical engineering, then subspecialized in signal processing and imaging which led me into MRI and CT which I further sub-specialized into cardiac imaging.
The question you'll need to figure out is which traditional branch of engineering you're going to layer your nursing training onto as a substrate? With a nursing degree you've got most of the biomed portion of a curriculum under your belt, now you just need to add the (traditional) engineering portion.
I don't know your other interests/background, so I might suggest industrial engineering as being a very fruitful area combined with nursing (especially if you're interested in research.) I can also see some applications of network theory (within computer science/electrical engineering and industrial engineering) being interesting -- think about the patient with a network of specialized careworkers, friends, family around them and how can one optimize that network to improve healthcare outcomes...
To help focus your search, take a look at "BME Focus Areas Course Lists" at http:/
Also: Do you want to do basic research? Teach? Design/Build/Manufacture products? Work with patients? Patient-based research medicine? These will help you narrow down which programs/degrees you may need professionally as the individual tracks have different requirements.