I really find your topic interesting. In reading the other responses and comments, it looks like there is much interested and potential for collaboration in your project.
I also read what you posted on the Excel chart. I found your description here to be more informational and clearer. What I hear from you is that you are interested in improving the mental and emotional well-being of caretakers who provide care in nursing home and/or rehabilitation centers? I think I hear you saying that communication between these two groups (patients and caregivers) needs to improve. You feel that the well-being of both parties and those around them (coworkers, other patients, families) will improve? Is this correct?
As Anthony mentioned, several facilities specialize in various forms of care (head injuries, elder care, physical rehabilitation, mental rehabilitation, hospice, cancer, HIV/AIDS, etc). You will need to focus your attention on what populations of patients or caregivers you are most concerned. I think this will provide you more ideas and inspiration on your product and help guide your research. It will also give you more head space to generate ideas for your actual product or informational designs.
I hope this is helpful. Please give me your feedback too.