Pl advice diet for a kidney patient with creatnine 3.5?

Diet with creat, 3.5: You need more information about your renal function and should see a nephrologist (n) to have a 24 hour urine collection for creatinine clearance and protein. Blood work is needed to see if your phosphorous and PTH are elevated and if your hemoglobin is < 10 grs/dl. You have chronic kidney disease and need to find out its cause. After these studies, your n can give more advice about your diet.