Patients with native kidney disease or chronic kidney transplant failure

An effective glomerular filtration rate (eGFR) according the MDRD formula between 20 and 75ml/min/1.73m2

Ejection fraction \>20%

Absence of liver cirrhosis or ascites

No evidence of active glomerulonephritis or immunosuppressive therapy if native kidney disease

Acute transplant rejection

Urinary protein excretion below 3g/d

Age between 18 and 70 years.

Fluid Intake in Kidney Failure