Hello Arafa

MD is master of doctorate.  Eligibility to pursue MD is to have mbbs degree along with completion of  six months internship.

Graduates with Bsc in dialysis technology can work in dialysis centres , clinics, hospitals.  Theur responsibilities include monitoring oatients, operating dialysis machines , undergoing dialysis and to follow proper procedures .

Courses to be pursued after bsc in renal dialysis are to pursue pgdm or msc ( master of science ) in renal dialysis or msc in dialysis Therapy.
After Msc you can do phD in renal dialysis .

For further details you may follow the link given below
https://www.careers360.com/colleges/manipal-college-of-health-professions-manipal/msc-renal-replacement-therapy-and-dialysis-technology-course