Which is better to work as nurse, CPCU or Acute Dialysis?

WOW those are so totally different arenas., What is your most interest? Dialysis is an early morning gig so consider that and that population of clients is very different from some others. But you do develop a long standing relationship with those folks.
CPCU however is cardiac so again a somewhat more stressful situation. It is all about your goals and your interest and the folks you prefer or are better equipped to work with. Good luck

I would say CPCU is more transferable and more of a stepping stone if you’re early in your career and want to advance to things like CICU, CRNA school, cath lab, etc. Acute dialysis is always needed but more niche.