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Item Value
Approval req'd? No
Available Stat? No
Test code CTX
Performed by Quest
Sendout? Yes
Method Electrochemiluminescent Immunoassay
Patient Preparation Fasting morning collection 8-10 am. (Diurnal variations cause elevated levels at night.) Minimum of 12 hours fasting is required.
Container type Red top, (Gold top acceptable)
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum
Processing notes Centrifuge and separate the serum from the cells. Freeze as soon as possible.
Units pg/mL
Normal range Pediatric:
Age Males Females
5-9 years 574-1849 pg/mL 574-1849 pg/mL
10-13 years 519-2415 pg/mL 519-2415 pg/mL
14-17 years 435-2924 pg/mL 242-1291 pg/mL

Age Males Females
18-29 years 87-1200 pg/mL 64-640 pg/mL
30-39 years 70-780 pg/mL 60-650 pg/mL
40-49 years 60-700 pg/mL 40-465 pg/mL
50-68 years 87-345 pg/mL Not available

Synonyms CTx; Collagen Type I; Bone markers; osteoporosis
Stability Room temperature 16 hours, refrigerated 3 days, frozen 3 months.
Turn around times 5-7 days
CPT coding 82523-90
Last Updated 6/24/2016 12:21:37
Entry Number 1377
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