Retinol-binding protein
Retinol-binding protein-994
Serum concentrations reflect the synthesis capacity of the liver and may indicate early malnutrition, acute and chronic hepatic disease, advanced chronic renal insufficiency, and cystic fibrosis. Assess nephritic syndrome and protein-losing enteropathy. Due to the short half-life of approximately 12 hours, RBP may be suitable for monitoring the nutritional status and efficacy of parenteral nutrition.
Immediately following collection, thoroughly mix sample by gently inverting 5 times
- Allow sample to clot for a minimum of 30 minutes
- Spin within two (2) hours of sample collection
Gold serum separator (SST) tube
Red:
- Allow sample to clot
- Spin
- Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum, within two (2) hours of sample collection
Dk green:
- Spin
- Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as the appropriate plasma type, within two (2) hours of sample collection
Ambient (preferred) - 14 days
Refrigerated - 14 days
Frozen - 14 days
Freeze/thaw cycles - stable x3
- Gross lipemia that cannot be clarified by ultracentrifugation
- Heat-inactivated samples
Immunologic
0 - 12 yrs: 1.2 - 4.6 mg/dL
13 - 60 yrs: 1.6 - 6.1 mg/dL
61 - 80 yrs: 1.8 - 6.1 mg/dL
>80 years: 1.6 - 6.1 mg/dL