Laboratory Test Information Guide

Details for C-Telopeptide, Plasma

Test Name: C-Telopeptide, Plasma
Alternate Name(s): Beta Crosslaps
β-CTX
C-Telo
Laboratory: Core
Specimen Type: Adult:
4 mL Lavender top (EDTA) Vacutainer tube

Pediatric:
0-2 years: 0.5 mL Lavender top (EDTA) Microtainer
2-10 years: 2 mL Lavender top (EDTA) Vacutainer tube

Red, Gold, or Light Green (Li-heparin) top tubes are also acceptable as long as the serum or plasma is analyzed or frozen within a few hours of collection; EDTA plasma is the preferred choice due to the greater stability of C-telopeptide in EDTA plasma

It is recommended for morning samples from fasting patients to be collected for this test
Collection Information: Minimum volume of plasma or serum required is 700 µL for adult samples or 200 µL for pediatric samples.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Thursday afternoons
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
5-7 days
Stat
N/A
 
Reference Range: Male:
<30 years: 238 - 1019 ng/L
30 - <40 years: 225 - 936 ng/L
40 - <50 years: 182 - 801 ng/L
50 - <60 years: 161 - 737 ng/L
60 - <70 years: 132 - 752 ng/L
≥70 years: 118 - 776 ng/L



Female:
<30 years: 148 - 967 ng/L
30 - <40 years: 150 - 635 ng/L
40 - <50 years: 131 - 670 ng/L
50 - <60 years: 183 - 1060 ng/L
60 - <70 years: 171 - 970 ng/L
≥70 years: 152 - 858 ng/L
Pre-menopausal: 136 - 689 ng/L
Post-menopausal: 177 - 1015 ng/L
Effective Date: 2015-04-15
Revised Date: 2021-04-02
Critical Value:  
Interpretive Comments: Increased levels of C-telopeptide occur in osteoporosis, Paget’s disease, primary hyperparathyroidism, renal insufficiency, and bone metastases.

Please note new reference intervals as of April 2, 2021
Special Processing:  
Comments: Biotin may interfere with this test. Samples should not be taken from patients receiving high biotin doses (i.e. > 5 mg/day) until at least 8 hours after the last biotin administration.
Method of Analysis: Roche Electrochemiluminescence
Critical Information Required:  
Storage & Shipment: Store and ship plasma or serum frozen.
System Codes: 
Cerner
CTELO
 
Referred To:  

Questions? Comments? Contact Laura Gopaul