Pathology Handbook

New search

Alternative Names:

CTX

Laboratory:

Clinical Biochemistry

Test Code:

CTX

Specimen Types:

Plasma

Container Types:

EDTA 6 mL
SST

Collection & Request Instructions:

Collect in am
Fasting Sample

Marker of bone resorption. Useful for monitoring the effect of anti-resorptive therapy and patient compliance.

Plasma EDTA is the preferred sample as it is stable longer than serum.

Stability of K2- and K3-EDTA plasma: 24 hrs at 20-25C, 8 days at 2-8C

3 months at -20C. For longer periods store at -70C. Freeze only ONCE.

Serum is only stable 6 hrs at 20-25 C, 8 hrs at 4 - 8C, 3 months at -20C. For longer periods store at -70C. Freeze only ONCE

Haemolyzed samples (Hb> 0.5 g/dL) elicit a decrease in the C-Telopeptide (Beta- crosslaps) concentration.

Processing Instructions:

Centrifuge
Aliquot
Store frozen

Transport Instructions between Sites and/or Laboratories:

Send to lab immediately
Use Esky from SDMH or CGMC to Alfred

For external sites transport to Alfred Pathology Frozen.

Assay Frequency:

Weekdays