UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

N-Telopeptide, random urine

Item Value
Approval req'd? No
Available Stat? No
Test code NTX
Performed by Quest
Sendout? Yes
Method Enhanced Chemiluminescence
Collection Instructions The preferred sample is a second void urine. have patient void first morning urine and collected second void.
Container type Urine cup
Amount to Collect Random urine
Sample type Random urine
Preferred volume 2 mL urine
Min. Volume 1 mL urine
UCSF Rejection Criteria Preserved or acidified sample.
Processing notes Aliquot 2 mL and freeze at -20C. Order Quest #36167X
Units nmol BCE/mmol creatinine (BCE = Bone Collagen Equivalents)
Normal range Pediatric:

0-6 months 2-32 nmol BCE/mmol creatinine
7-11 months 2-36 nmol BCE/mmol creatinine
1-2 years 2-128 nmol BCE/mmol creatinine
3-8 years 2-149 nmol BCE/mmol creatinine
9-12 years 2-183 nmol BCE/mmol creatinine
12-18 years male 20-370 nmol BCE/mmol creatinine
> 12 years female 20-320 nmol BCE/mmol creatinine


Premenopausal Females 4-64 nmol BCE/mmol creatinine


Males:
18-29 years 12-99 nmol BCE/mmol creatinine
30-59 years 9-60 nmol BCE/mmol creatinine
Synonyms Collagen-Crosslinked
Stability Room temperature 3 days, refrigerated 5 days, frozen at -20C 1 month
Turn around times Test run Tuesday-Sunday Turnaround time: 2-6 days.
Additional information This assay reflects breakdown of bone matrix by collagenase. A value within the premenopausal range does not exclude osteoporosis or the need for therapy.

Results are primarily of use in monitoring the
response to treatment. A decline of ≥ 30% following 6 months of estrogen replacement therapy is indicative of a positive therapeutic response in postmenopausal women and in 88% of women was associated with maintained or increased bone mineral density Ref: Chestnut CH et al. Amer J Med 1997;192:29
CPT coding 82523-90
Medical Necessity? Yes. Click here for more information
LOINC code 14115-0
Last Updated 3/24/2013 7:53:42 PM
Entry Number 889
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center