Find Locations
For hours, walk-ins and appointments.Expected Turnaround Time
3 - 6 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Serum or plasma
Volume
1 mL
Minimum Volume
0.4 mL
Container
Red-top tube, gel-barrier tube, or green-top (heparin) tube
Collection
Separate serum or plasma from red blood cells.
Storage Instructions
Room temperature
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Causes for Rejection
Gross lipemia that cannot be clarified by ultracentrifugation; heat-inactivated samples
Test Details
Use
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.1
Methodology
Immunologic
Reference Interval
See table.
Age | Range (mg/dL) |
|---|---|
0 to 12 y | 1.2−4.6 |
13 to 60 y | 1.6−6.1 |
61 to 80 y | 1.8−7.3 |
>80 y | 1.6−6.1 |
Additional Information
Responsible for binding and transporting retinol (vitamin A).
Footnotes
1. Haider M, Haider SQ. Assessment of protein-calorie malnutrition. Clin Chem. 1984 Aug; 30(8):1286-1299.6430595
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 123060 | Retinol binding Protein(RbP) | 1836-6 | 123061 | Retinol Binding Protein(RbP) | mg/dL | 1836-6 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf