2 - 4 days
Update Type: Reference range changed
Test Updated: 06/30/2020
C-terminal collagen crosslinks
B-CTx
C-Telopeptides, Serum
C-Telopeptide, Beta Cross-Linked, Serum
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Test Overview
Electrochemiluminescence Immunoassay
An aid in monitoring antiresorptive therapies (eg, bisphosphonates and hormone replacement therapy) in postmenopausal women treated for osteoporosis and individuals diagnosed with osteopenia. An adjunct in the diagnosis of medical conditions associated with increased bone turnover
MALES: <5 yrs 242-1292 pg/mL; 5-9 yrs: 351-1532 pg/mL; 10-15 yrs: 447-2457 pg/mL; 16-17 yrs: 478-1666 pg/mL; 18-30 yrs: 120 - 946 pg/mL; 31-50 yrs: 93 - 630 pg/mL; 51-70 yrs: 35 - 836 pg/mL; >70 yrs: not established. FEMALES: <5 yrs:347-1508 pg/mL; 5-9 yrs: 383-1556 pg/mL; 10-15 yrs: 311-1776 pg/mL; 16-17 yrs: 146-1266 pg/mL; Premenopausal: 25 - 573 pg/mL; Postmenopausal: 104 - 1008 pg/mL.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect specimen in an SST or red top tube from a fasting patient. Centrifuge, aliquot serum into a plastic vial and freeze (preferred) or refrigerate up to 3 days.
