Urea

4.5 ml Lithium Heparin or 8.5 ml Serum

0-<2w: 1.0 to 8.2 mmol/L 2w-<1y: 1.2 to 6.0 mmol/L 1y -<10y 3.2 to 7.9 mmol/L F 10y-<19y 2.6 to 6.8 mmol/L M 10y -<19y 2.6 to 7.5 mmol/L F 19y- <50 3.0 to 7.0 mmol/L M 19y- <50 3.5 to 8.0 mmol/L F 50y- <70 3.5 to 8.0 mmol/L M 50y- <70 4.0 to 9.0 mmol/L F >=70y 4.0 to 9.0 mmol/L M >=70y 4.5 to 10.0 mmol/L