Feedback
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.
Submit With Order
Additional Technical InformationAdditional Technical Information
 
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 (lithium 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 NameLOINC
0070415C-Telopeptide, Beta-Cross-Linked, Serum41171-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • 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