Cross-Linked N-telopeptide, Serum
Test Mnemonic
NTX
CPT Codes
- 82523 - QTY (1)
LOINC ®
21215-9
Aliases
- NTX, Serum
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Serum | SST (Gold) | Frozen | Remove serum from the gel as soon as possible, no later than 2 hours from the time of collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Remove serum from the gel as soon as possible, no later than 2 hours from the time of collection. |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 1 day |
| Refrigerated | 7 days |
| Frozen | 14 days (Avoid repeated freeze/thaw cycles) |
Days Performed
Alternate Wed
Turnaround Time
1 - 14 days
Methodology
| Name | Description |
|---|---|
| Enzyme Immunoassay (EIA) |
Reference Range
| Cross-Linked N-telopeptide, Serum | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Female | Normal | 6.2 - 19.0 | nM BCE | Male | Normal | 5.4 - 24.2 | nM BCE |
Special Info
For monitoring therapy, baseline samples should be collected just prior to or on the day of therapy initiation. Subsequent specimens for comparison should be collected at approximately the same time of day as the baseline specimen.
Clinical Info
Evaluation of osteoporosis and other catabolic states of bone. Results may be confounded in patients afflicted with other clinical conditions known to affect bone resorption, eg metastases to bone.