Preferred Sample Type
Suitable Specimen Types
- EDTA Plasma
0.5mL minimum plasma
Sample Processing in Laboratory
Separate and freeze plasma within 24 hours of specimen collection. Transport to referral laboratory on dry ice.Sample Preparation
Spin and freeze plasmaSample Stability
CTX is relatively stable in EDTA containers - plasma should be separated and frozen within 24 hours of specimen collection.CTX bone marker (Collagen Type I cross-linked C telopeptide; bone markers)
Patient Preparation
Suggest take samples for monitoring at approximately the same time of day to improve interpretation of results. Fasting is not required for this test.
Reference Range
|
|
Plasma CTX (ug/L) |
|
|
|
Male |
Female |
|
< 1 month |
0.44 – 2.27 |
|
|
1 month – 1 year |
0.20 – 2.31 |
|
|
1 -9 years |
0.15 – 0.82 |
|
|
Age/gender specific ranges |
9-14 yrs: 0.23 – 1.24 |
9-11 yrs: 0.30 – 0.10 |
|
|
14-17 yrs: 0.24 – 1.73 |
11-13 yrs: 0.33 – 1.70 |
|
|
17-19yrs: 0.10 – 0.79 |
13-15yrs: 0.14 - 1.20 |
|
|
|
15-19 yrs: 0.05 – 0.58 |
|
Adults |
0.1 – 0.5 (males/pre-menopausal females) |
|
Source: referral laboratory (July 2014)