Information taken from Newcastle website: The Brahms CT-proAVP assay measures the C-terminal precursor fragment of arginine vasopressin (AVP), otherwise known as copeptin. Copeptin is released on an equimolar basis with AVP and therefore measurement of serum/plasma copeptin provides a surrogate measure of AVP concentrations. Clinical indication for requesting: differential diagnosis of polyuria / polydipsia syndromes. Copeptin measurements are of most value when taken under an osmotic stimulus.
|Tube||01 (SE) - Serum Gel|
|Additional Information||**Only available to Endocrinology. Requests should be discussed with the Duty Biochemist, 0113 39 26922, option 2** Please include clinical details and concurrent osmolality with all requests.|
|Turn Around||Turnaround time stated by Newcastle: 4 weeks.|
|Send to||Blood Sciences LGI
(Test referred to: Newcastle Royal Victoria Infirmary.)
|Contact||For further details please contact Leeds Pathology customer services: email@example.com.|
|Advice||Full information on all referred tests can be found on the referred tests information database, EQMS reference BSF2REC17003.|
|Collection Con||Instructions to lab: Centrifuge sample, separate serum and store in fridge. EDTA plasma or lithium heparin plasma also acceptable.
Minimum volume: 1 mL serum/plasma.
|Ref. Range Notes||No single reference range is applicable as copeptin varies according to plasma osmolality in normal individuals. An interpretive comment will be included with each report.|
|Telepath||COPT1R. LGI Superset LCOPT adds SA1R. SJUH Superset JCOPT adds JCHM1L|
|ICE Codes||LCOPT / JCOPT|