Albumin

SI UNITS (recommended)

CONVENTIONAL UNITS



* The SI unit is the recommended method of reporting clinical laboratory results

Synonym
ALB
Units of measurement
mmol/L, µmol/L, mcmol/L, umol/L ,µM/L, mcM/L, uM/L, micromol/L, g/L, g/dL, g/100mL, g%, mg/mL

Albumin is a carbohydrate‑free protein, which constitutes 55‑65 % of total plasma protein. It maintains oncotic plasma pressure, and is also involved in the transport and storage of a wide variety of ligands and is a source of endogenous amino acids. Albumin binds and solubilizes various compounds, e. g. bilirubin, calcium and long-chain fatty acids. Furthermore albumin is capable of binding toxic heavy metal ions as well as numerous pharmaceuticals, which is the reason why lower albumin concentrations in blood have a significant effect on pharmacokinetics.

Hyperalbuminemia is of little diagnostic significance except in the case of dehydration. Hypoalbuminemia occurs during many illnesses and is caused by several factors: compromised synthesis due either to liver disease or as a consequence of reduced protein uptake; elevated catabolism due to tissue damage (severe burns) or inflammation; malabsorption of amino acids (Crohn’s disease); proteinuria as a consequence of nephrotic syndrome; protein loss via the stool (neoplastic disease). In severe cases of hypoalbuminemia, the maximum albumin concentration of plasma is 2.5 g/dL. Due to the low osmotic pressure of the plasma, water permeates through blood capillaries into tissue (edema). The determination of albumin allows monitoring of a controlled patient dietary supplementation and serves also as an excellent test of liver function.

Reference Intervals

Reference intervals according to Tietz

0-4 days 2.8-4.4  g/dL 28-44 g/L 421-662 µmol/L
4 days-14 years 3.8-5.4  g/dL 38-54 g/L 572-812 µmol/L
14-18 years 3.2-4.5  g/dL 32-45 g/L 481-677 µmol/L
18-60 years 3.5-5.2  g/dL 35-52 g/L 527-782 µmol/L
60-90 years 3.2-4.6  g/dL 32-46 g/L 481-692 µmol/L
>90 years 2.9-4.5  g/dL 29-45 g/L 436-677 µmol/L
Units description
millimole per liter mmol/L = mM/L = millimol/L
micromole per liter µmol/L = mcmol/L = umol/L = µM/L = mcM/L = uM/L = micromol/L
gram per liter g/L = gram/L
gram per deciliter g/dL = gram/dL
gram per 100 milliliters g/100mL = gram/100mL
gram percent g% = gram%
milligram per milliliter mg/mL = millig/mL = milligram/mL

Lab units Conversion Calculator. Convert Albumin level to mmol/L, µmol/L, mcmol/L, umol/L ,µM/L, mcM/L, uM/L, micromol/L, g/L, g/dL, g/100mL, g%, mg/mL. Clinical laboratory units online conversion from conventional or traditional units to Si units. Table of conversion factors for Albumin.