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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
ARUP Consult®
Disease Topics
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 years500-1800 pg/mL500-1700 pg/mL
7-9 years566-1690 pg/mL522-1682 pg/mL
10-12 years503-2077 pg/mL553-2071 pg/mL
13-15 years160-1590 pg/mL485-2468 pg/mL
16-17 years167-933 pg/mL276-1546 pg/mL
18-29 years64-640 pg/mL87-1200 pg/mL
30-39 years60-650 pg/mL70-780 pg/mL
40-49 years40-465 pg/mL60-700 pg/mL
50-69 years 40-840 pg/mL
70 years or greater 52-847 pg/mL
Postmenopausal104-1008 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