If you type haemodialysis into the Blue Search Box there is much info there for you.......Wilba.
Have a look at the Nation Kidney Federation web site - http://www.kidney.org.uk/holidays/dialysis_cruises.html
This lists several sites catering for HD patients.
I am not sure but I think I remeberr on one of the Holland America ships they do. Hope this may help.
Visit www.dialysisholidays.co.uk They have a list of cruises with haemodialysis onboard.