Ntelopeptide
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Collagen Cross-Linked N-Telopeptide (NTx), Random Urine
Test ID: COLCLNPEP U
Test
Aliases/Synonyms
Method
Chemiluminescence
Report Includes
N-Telopeptide; Creatinine
Specimens
Urine
Clinical Utility
NTx is useful to assess bone resorption in patients with metabolic bone disease. The test is also useful in monitoring therapy to slow or halt osteoporotic bone loss. A decline of 30% or more of NTx over a six-month period suggests effective therapy.
Test Location
Quest Diagnostics, California USA
Test Version
18-Aug-2023
Specimen
Specimens
Urine
Collection Containers
Sterile Container
Sample Volume
2 mL
Minimum Volume
1 mL
Collection & Handling
Collection Instructions
Second morning void urine: Discard the first morning void. Collect the second morning void. Mix well. Do not use preservatives. Acidified specimen is not acceptable.
Handling Information
Store and send frozen.
Stability
| Ambient | 3 days |
|---|---|
| Refrigerated | 5 days |
| Frozen | 30 days |
Rejection Criteria
| Specimen | Preservative |
|---|
Test Version
18-Aug-2023
Performance / Interpretation
Method
Chemiluminescence
Turnaround Time
8 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| N-Telopeptide, Random Urine | nM BCE/mM creat |
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Results are primarily used for monitoring the response to therapy. A value within the premenopausal reference range does not rule out osteoporosis nor the need for therapy.
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| Creatine, Random Urine | mg/dL |
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Test Location
Quest Diagnostics, California USA
Test Version
18-Aug-2023
Interface / Setup
HL7 Interface Codes
| Order Code | Result Codes | Units |
|---|---|---|
| COLCLNPEP U | 65186N-Telopeptide (NTx) | nM BCE/mM creat |
| 65187Creatinine, Random Urine | mg/dl |
Test Version
18-Aug-2023