Skip to main content
Oxford University Hospitals NHS Foundation Trust
Clinical Biochemistry

This site is best viewed with a modern browser. You appear to be using an old version of Internet Explorer.


Also known as: PRA

Specimen requirements

Sample type: Plasma (EDTA)

Collection requirements: Specimen must be separated and frozen within six hours of collection. Plasma potassium must be at least 3.0 mmol/L for accurate interpretation of results.


Price on application

Turnaround time

Please see Turnaround times

Analytical method


Analysis undertaken at these site(s)

John Radcliffe Hospital

Reference intervals


All ages: 11 - 32 mIU/L


All ages: 11 - 32 mIU/L