Assessing nutritional status
Aiding in the diagnosis of multiple sclerosis when used in conjunction with serum IgG, and cerebrospinal fluid IgG and albumin concentrations
Only orderable as part of profile. For more information see: SFIG / Cerebrospinal Fluid (CSF) IgG Index Profile, Serum and Spinal Fluid
Photometric
ALB
Albumin, S
Hypoalbuminemia
Nephrotic Syndrome
Serum
Only orderable as part of profile. For more information see: SFIG / Cerebrospinal Fluid (CSF) IgG Index Profile, Serum and Spinal Fluid
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
0.5 mL
Gross hemolysis | Reject |
Gross lipemia | OK |
Gross icterus | OK |
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum | Refrigerated (preferred) | 14 days | |
Frozen | 120 days | ||
Ambient | 7 days |
Assessing nutritional status
Aiding in the diagnosis of multiple sclerosis when used in conjunction with serum IgG, and cerebrospinal fluid IgG and albumin concentrations
Albumin is a carbohydrate-free protein, which constitutes 55% to 65% of total plasma protein. It maintains oncotic plasma pressure, is 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, including bilirubin, calcium, long-chain fatty acids, toxic heavy metal ions, and numerous pharmaceuticals.
Hypoalbuminemia is caused by several factors: impaired synthesis due either to liver disease (primary) or due to diminished protein intake (secondary), increased catabolism as a result of tissue damage and inflammation, malabsorption of amino acids, and increased renal excretion (eg, nephrotic syndrome).
Measurement of albumin in serum is helpful when paired with albumin measured in cerebrospinal fluid (CSF) along with total IgG in serum and CSF as an aid in evaluating multiple sclerosis and other conditions where the integrity of the blood brain barrier is reviewed. The combination of these four analytes is referred to as CSF IgG index.
Only orderable as part of profile. For more information see: SFIG / Cerebrospinal Fluid (CSF) IgG Index Profile, Serum and Spinal Fluid
> or =12 months: 3500-5000 mg/dL
Reference values have not been established for patients who are <12 months of age.
Hyperalbuminemia is of little diagnostic significance except in the case of dehydration. When plasma or serum albumin values fall below 2.0 g/dL, edema is usually present.
Albumin concentration determined by the bromcresol green method may not be identical to the albumin concentration determined by electrophoresis.
1. Rifai N, Horvath AR, Wittwer CT, eds. Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. 6th ed. Elsevier; 2018
2. Peters T, Jr: Serum albumin. In: Putnam F, ed. The plasma proteins. Vol 1. 2nd ed. Academic Press; 1975
The dye, bromocresol green (BCG), is added to serum in an acid buffer. The color intensity of the blue-green albumin-BCG complex is directly proportional to the albumin concentration and is determined photometrically.(Package insert: Roche Albumin reagent. Roche Diagnostics; 03/2015)
Monday through Sunday
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
82040
Test Id | Test Order Name | Order LOINC Value |
---|---|---|
ALBS1 | Albumin, S | 1751-7 |
Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
---|---|---|
ALB_S | Albumin, S | 1751-7 |