<s>[INST] My relative is 85 yr male. Was told kidney function tests came back as 54 and 1.8. Were 39 and 1.3 last week. I think the 1.? number is cretine levels, not sure what the other is? How bad is this? Can we do anything besides drainage via catherters and drinking more fluids? [/INST] Likely the Ist value is urea and the second value is creat. At his age people are quite susceptible for renal injury with commonest ppt factors being dehydration, pain killers, overprescription of antihypertensives, especially those who are suffering from diabetes  or hypertension . Although there could be other causes. Hence he might require to be seen by a nephrologist if a repeat urea and creatinine are not normal. </s>