C-Telopeptide, Beta-Cross-Linked, Serum
0070416
 
Ordering Recommendation
Mnemonic
CTX
Methodology
Quantitative Electrochemiluminescent Immunoassay
Performed
Tue, Thu, Sat
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
For patients receiving therapy with high biotin doses (e.g. greater than 5 mg/day), specimen should not be drawn until at least 8 hours after the last biotin administration.  
Collect
Serum separator tube, pink (K2EDTA), or green (sodium heparin).  
Specimen Preparation
Allow serum separator tube to sit for 15-20 minutes at room temperature for proper clot formation. Centrifuge and separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
Hemolyzed specimens.  
Remarks
 
Stability
After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 3 months  
Reference Interval
Effective November 14, 2011
Age Female Male
6 months-​6 years 500-​1800 pg/mL 500-​1700 pg/mL
7-​9 years 566-​1690 pg/mL 522-​1682 pg/mL
10-​12 years 503-​2077 pg/mL 553-​2071 pg/mL
13-​15 years 160-​1590 pg/mL 485-​2468 pg/mL
16-​17 years 167-​933 pg/mL 276-​1546 pg/mL
18-​29 years 64-​640 pg/mL 87-​1200 pg/mL
30-​39 years 60-​650 pg/mL 70-​780 pg/mL
40-​49 years 40-​465 pg/mL 60-​700 pg/mL
50-​69 years 40-​840 pg/mL
70 years or greater 52-​847 pg/mL
Postmenopausal 104-​1008 pg/mL
Interpretive Data
Note
CPT Code(s)
82523
Components
Component Test Code*Component Chart Name
0070415C-Telopeptide, Beta-Cross-Linked, Serum
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References
  • Beta-CTx
  • ?-Cross Laps
  • B-CTx
  • Beta-Cross Laps
  • bone resorption marker
  • C-Telopeptide
  • C-terminal collagen crosslinks
  • Carboxy terminal collagen crosslinks
  • Collagen C Telopeptide
  • Collagen Type I-C
  • Collagen Type I-C Telopeptide
  • CTx