Laboratory: Clinical Biochemistry
Test Name:
Test Code: CTX
Clinical Information:
Plasma (EDTA) and plasma (Na-Heparin) are also acceptable.
Used as a biochemical marker of bone resorption.
Alternate test names:  B-CTx, Beta CrossLaps, Beta-CTx, C-Telopeptide, C-terminal collagen crosslinks, Carboxy terminal collagen crosslinks, CTx.
Collection Devices:
Fasting specimen is recommended.  Should be collected between 7:00-9:00 AM due to marked diurnal variation.
Specimen Required:

Serum: 2.0 mL
Pediatric Serum: 0.25 mL
Reference Values:
Within 5 Days
See Also:
More Information:
Separate from cells and freeze @ -20 degrees C.   Store and send frozen to In-Common Laboratories.