Caduceus Symbol Is There A Single, Official Registered Nurse Caduceus Symbol ?

Is there a single, official Registered Nurse Caduceus symbol ? - caduceus symbol

I for sure that the correct symbol carved in stone the head to know my little sister died. She was a nurse. I was confused by the diversity of the RN Caduceus, when I tried to answer this question through research on the Internet. I mean it sincerely ask for help. Thank you.