Retinol-binding Protein (RbP)

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Category:

Turnaround Time: 3 - 6 days
CPT Code:

83883

Test Type: 1 mL Serum or plasma
Stability Time:

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3
Reference Range:

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

Overview:

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

Responsible for binding and transporting retinol (vitamin A).

1. Haider M, Haider SQ. Assessment of protein-calorie malnutrition. Clin Chem. 1984 Aug; 30(8):1286-1299. PubMed 6430595

Collection Details:

Collection Instructions:

Red-top tube, gel-barrier tube, or green-top (heparin) tube.

Separate serum or plasma from red blood cells.

Room temperature.