Patient Tech @ Dialysis Clinic - limiting?

I've been offered a Patient Tech position at a Dialysis clinic while I wait for Nursing School to start (Fall 2011). I am a new CNA and think this would be a great opportunity to gain some patient care experience but I am worried this work will limit my experience and possibly hurt me when I'm a new Grad looking for an RN position. Am I over analyzing?? Should I work at a hospital instead? Any advice is appreciated.