Austin Pathology

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C-Telopeptide

Alternate Names
Carboxyterminal crosslinked telopeptide of type 1 collagen, CTX, beta crosslaps
Ordering Information

CTX is a marker of bone resorption

A request for Bone Markers will result in the assay of both CTX and P1NP.

Please note: Harmonised Reference Intervals implemented 18th March 2015.

Laboratory
Biochemistry
Specimen
Blood
Container
Serum tube (gold top)
Additional Collection Instructions

A fasting sample is preferred but not obligatory.

For long term monitoring, it is recommended that samples are collected at the same time of the day.

Other serum tests can be collected into the same tube.

Minimum Adult Volume
5mL
Minimum Paediatric Volume
1mL
Notes

Either the test must be assayed or the serum frozen within 8 hrs of collection.

Frequency
Three times a week
Reference Interval
CTX 20 - 50Y F 150 - 800 ng/L
CTX 50 - 70Y F 50 - 800 ng/L
CTX >70Y F 100 - 1000 ng/L
CTX 20 - 25Y M 400 - 900 ng/L
CTX 25 - 70Y M 100 - 600 ng/L
CTX >70Y M 100 - 750 ng/L

 Source: Australian Consensus Reference Interval