Department: 
Biochemistry
Tube Colour: 
Pink
Pseudonyms: 
ADH, Vasopressin, CT proAVP, C-Terminus Pro-Arginine Vasopressin
Test Code: 
COPEP
Availability: 
Fortnightly
Collection Requirements: 
Morning samples after 8 hour fast (without water restriction) are recommended unless otherwise stated by clinician. Plasma (EDTA or Heparin) and serum samples are suitable.
Requires own tube?: 
No
Fee: 
This is a Non-Medicare–Refundable Test with a cost to the patient of $ 50.00
Reference Laboratory: 
Sydney South Western Area Pathology ServiceRoyal Prince Alfred HospitalCentral Specimen ReceptionMissenden RoadCamperdown, NSW 2050tel 02 9515 8279fax 02 9515 7931
Reference Range: 
Non-water deprived, non-fasting adults < 16.3 pmol/L Non-water deprived, fasting ( >8hrs) adults < 15.2 pmol/L Non-water deprived, non- fasting paediatric subjects < 14.5 pmol/L
Notes: 
Copeptin (aka C- Terminus Pro-Arginine Vasopressin, CT-proAVP) is the C-terminal glycoprotein moiety of pre-provasopressin and is released in the same amount as AVP and can be used as a surrogate for ADH concentration. Copeptin has a much longer plasma half-life than ADH (days compared to minutes) and has greater stability at room temperature and therefore is less prone to preanalytical errors.