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Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

minimum sample volume required ~ 4ml

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Test Code: REN

Tube type: EDTA

Other acceptable tube types
Lithium heparin (pale green) also accepted but EDTA preferred

Special instructions
Samples must be transported to the lab at room temperature. DO NOT TRANSPORT CHILLED ON ICE.
MUST be received in lab within 4 hours of collection.
Sample time MUST be stated on form.
Serum potassium must be >3mmol/L.

Sent away to Charing Cross Hospital, London

Reference range
0.5 - 3.5


Linked to

Turnaround Time
28 days

Department: Biochemistry

Clinical Application
Measurement of renin-aldosterone ratio in plasma is useful in investigation of suspected Conn's syndrome. See also Aldosterone

Interpretation of Aldosteron/Renin ratio (ARR):
Conn's unlikely: <680
Possible Conn's: >850
Conn's very likely: >1700


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