Test Details
Methodology
Enzyme-linked immunosorbent assay (ELISA)
Result Turnaround Time
2 - 4 days
Use
This test is used to evaluate bone disease. Increased levels of osteocalcin are found in bone diseases characterized by increased bone turnover. Osteocalcin has been found to be elevated in Paget disease of the bone, cancer accompanied by bone metastases, primary hyperparathyroidism and renal osteodystrophy. Osteocalcin levels may serve as useful index in evaluating the therapeutic management of the patient.
Specimen Requirements
References
Custom Additional Information
Osteocalcin, or bone Gla protein (BGP), is the major noncollagenous protein of bone matrix. It has a molecular weight of approximately 5.8 kilodaltons and consists of 49 amino acids, including three residues of γ-carboxyglutamic acid. Osteocalcin is synthesized in bone by osteoblasts. After production, it is partly incorporated into the bone matrix and partly delivered to the circulatory system. The precise physiological function of osteocalcin is still unclear. A large number of studies have shown that the circulating level of osteocalcin reflects the rate of bone formation.
Determination of serum osteocalcin has proven to be valuable as an aid in identifying women at risk of developing osteoporosis, for monitoring bone metabolism during perimenopause and postmenopause, and during antiresorptive therapy.
Specimen
Serum, frozen
Volume
0.8 mL
Minimum Volume
0.4 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube or gel-barrier tube
Storage Instructions
Freeze.
Collection Instructions
Transfer the serum into a Labcorp PP transpak frozen purple tube with screw cap (Labcorp No. 49482). Freeze immediately and maintain frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | unstable |
Refrigerated | unstable |
Frozen | -20°C = 30 days; -70°C = 90 days |
Reference Range
See table.
Age | Male (ng/mL) | Female (ng/mL) |
|---|---|---|
0 to 5 y | 14.7–99.9 | 14.7–99.9 |
6 to 8 y | 22.1–103.6 | 31.4–134.7 |
9 to 10 y | 25.5–107.9 | 31.4–134.7 |
11 to 12 y | 33.4–137.9 | 33.4–137.9 |
13 to 14 y | 30.4–156.5 | 17.8–106.0 |
15 to 17 y | 13.1–109.7 | 11.0–51.7 |
18 to 30 y | 7.8–37.1 | 5.7–25.5 |
31 to 40 y | 6.0–25.7 | 5.7–25.5 |
41 to 50 y | 4.9–21.9 | 5.2–22.4 |
51 to 60 y | 4.9–21.9 | 5.0–29.5 |
61 to 70 y | 4.8–22.9 | 5.0–29.5 |
>70 y | 4.1–25.0 | 5.0–29.5 |
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 010249 | Osteocalcin, Serum | 2697-1 | 010250 | Osteocalcin, Serum | ng/mL | 2697-1 |
| Order Code | 010249 | |||||
| Order Code Name | Osteocalcin, Serum | |||||
| Order Loinc | 2697-1 | |||||
| Result Code | 010250 | |||||
| Result Code Name | Osteocalcin, Serum | |||||
| UofM | ng/mL | |||||
| Result LOINC | 2697-1 |