When it is necessary to do kidney transplant and how long does a kidney transplant patient survive?

As per my understanding, you are looking for the renal transplant. Renal transplant should not be an issue. But it is a major procedure therefore patient's overall health, associated comorbidities, patient's age, weighing benefits over risk are some of the factors to be considered. You need to have a qualified donor who was selected from donor's list. There is an entire protocol to match with donor. Patient's fitness will be decided by nephrologist and his team. Also lifestyle changes, emotional support, counselling of patient and family to deal with the disease will improve the quality of life. Please consult Nephrologists in Mumbai, or in any other city.