Dear friend, welcome to Healthcaremagic! I am Dr. Prasad Akole (Critical Care Expert- http://bit.ly/Dr-Prasad-Akole) and am glad to address to your query here. The urea and creatinine levels of your relative are very high. It may be because of outside food which is not advocated for CKD as they need renal diet. Also any intercurrent complication like infection or comorbidities like heart disease etc may cause fluctuating high levels. The dialysis frequency here is obviously inadequate. He needs re-evaluation by his nephrologist and more stringent control on dialysis and diet. As life expectancy also depends on many other factors and other diseases he may have, it cannot be commented upon here. In general, for a 70 year old with stage5 CKD, life is short. I hope to have answered your query satisfactorily. I would be glad to answer any further queries. Take care and please keep me informed of your progress at http://bit.ly/Dr-Prasad-Akole Good Luck! As it helps us to improve continuously, may I request you to write a rating review before you ‘accept’ and ‘close’ the query. Thank you!!