High creatinine levels of 10. Average creatinine in the last 5 months has been 3. Recurring urine infections have pushed the creatinine to this level now. Phosphorus 9.9. History of diabetes for last 15 years. However average urine output daily is 1000 ml on a fluid intake of average 1300 ml. My question is if urine output is good, is dialysis needed? I think with proper hydration we should be able to bring her creatinine levels down. Is it possible that she has such high creatinine now because of lasix 2 tabs twice daily for 1 week that caused dehydration? Is peritoneal dialysis possible and effective at this age considering she is 94 now? Should we even look at Peritoneal dialysis as she is very weak now.