title: [Staging and measurement of renal function in chronic renal conditions].
abstract: Kidney failure has traditionally been categorised as mild, moderate or severe. Other poorly defined terms like uraemia and end-stage kidney disease have commonly been applied. During the last few years, an international consensus has emerged staging chronic kidney disease into 5 stages: stage 1 being glomerular filtration rate (GFR) > 90 ml/min and signs of kidney damage, stage 2 GFR 60-89 ml/min and signs of kidney damage, stage 3 being GFR 30-59 ml/min, stage 4 being GFR 15-29 ml/min, and stage 5 GFR < 15 ml/min. Kidney function should be calculated from creatinine-based formulas, or measured by isotope or iohexol clearances rather than as renal clearance of creatinine in timed urine samples. We address the importance and implications of these new definitions.
authors: Nyreseksjonen, Medisinsk avdeling, Rikshospitalet. anders.hartmann@rikshospitalet.no
authors: Anders
authors: A
authors: Hartmann
authors: Hallvard
authors: H
authors: Holdaas
authors: Ingrid
authors: I
authors: Os
authors: Odd Helge
authors: OH
authors: Hunderi
authors: Stein
authors: S
authors: Hallan
authors: Tor Erik
authors: TE
authors: Widerøe
authors: Einar
authors: E
authors: Svarstad
authors: Kristian
authors: K
authors: Selvig
authors: Helge
authors: H
authors: Skjønsberg
authors: Ingrid
authors: I
authors: Toft