Laboratory Medicine

Test Catalogue

Beta-Crosslaps
Test Name Beta-Crosslaps (CTx, Beta-CTx, C-Telopeptide, Carboxy terminal collagen crosslinks)
Specimen Type / Requirements Container Type = 1 Gold Top (SST) Minimum Testing Volume = 0.5 mL Serum Tube must fill to at least ½ or greater of its vacuum capacity
Specimen Handling Collection Instructions: It is recommended to draw blood as fasting or morning samples. Collect sample in vacutainer with or without gel separator. Plasma collected in EDTA or heparin containing vacutainer (lavender or green top) are acceptable too. Write your initials, date and time of collection on the collection label or requisition. Laboratory Staff Instructions: Separate samples from cells as soon as possible. Repeated freezing and thawing of samples should be avoided. Rejection Criteria: Grossly Hemolyzed and icteric samples, unlabeled or samples of non sufficient quantity. Hemolyzed sample (Hb > 5 g/L) will elicit a decrease in the β-CTx concentration. Stability: Stable for 6 hours at room temperature, 8 hours refrigerated, and 1 year frozen. Transportation: Send sample to core lab as soon as possible.
Required Documentation
Turnaround Time 2 hours
Reference Value Male: < 29.9 years: 238 – 1019 ng/L 30 – 39.9 years: 225 – 936 ng/L 40 – 49.9 years: 182 – 801 ng/L 50 – 59.9 years: 161 – 737 ng/L 60 – 69.9 years: 132 – 752 ng/L >70 years: 118 : 776 ng/L	Female: < 29.9 years: 148 – 967 ng/L 30 – 39.9 years: 150 – 635 ng/L 40 – 49.9 years: 131 – 670 ng/L 50 – 59.9 years: 183 – 1060 ng/L 60 – 69.9 years: 171 – 970 ng/L >70 years: 152 – 858 ng/L Pre-menopausal: 136 – 689 ng/L Post-menopausal: 177 – 1015 ng/L
Test Code BCLAP	Methodology Chemiluminescent Assay
Testing Location SMH-Biochemistry	Other Information Last Updated: July 13th, 2026

Beta-Crosslaps

Test Name

Beta-Crosslaps (CTx, Beta-CTx, C-Telopeptide, Carboxy terminal collagen crosslinks)

Specimen Type / Requirements

Container Type = 1 Gold Top (SST)

Minimum Testing Volume = 0.5 mL Serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: It is recommended to draw blood as fasting or morning samples. Collect sample in vacutainer with or without gel separator. Plasma collected in EDTA or heparin containing vacutainer (lavender or green top) are acceptable too. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Separate samples from cells as soon as possible. Repeated freezing and thawing of samples should be avoided.

Rejection Criteria: Grossly Hemolyzed and icteric samples, unlabeled or samples of non sufficient quantity. Hemolyzed sample (Hb > 5 g/L) will elicit a decrease in the β-CTx concentration.

Stability: Stable for 6 hours at room temperature, 8 hours refrigerated, and 1 year frozen.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time

2 hours

Reference Value

Male:

< 29.9 years: 238 – 1019 ng/L
30 – 39.9 years: 225 – 936 ng/L
40 – 49.9 years: 182 – 801 ng/L
50 – 59.9 years: 161 – 737 ng/L
60 – 69.9 years: 132 – 752 ng/L
>70 years: 118 : 776 ng/L

Female:

< 29.9 years: 148 – 967 ng/L
30 – 39.9 years: 150 – 635 ng/L
40 – 49.9 years: 131 – 670 ng/L
50 – 59.9 years: 183 – 1060 ng/L
60 – 69.9 years: 171 – 970 ng/L
>70 years: 152 – 858 ng/L

Pre-menopausal: 136 – 689 ng/L

Post-menopausal: 177 – 1015 ng/L

Test Code

BCLAP

Methodology

Chemiluminescent Assay

Testing Location

SMH-Biochemistry

Other Information

Last Updated: July 13th, 2026