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Blood Sciences

Blood Test Information

minimum sample volume required ~ 4ml

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Test Code: ALD

Tube type: EDTA

Special instructions
Get to lab within 5 mins for separation and freezing within 15 minutes.
Serum potassium must be >3mmol/L.
Sent away to Charing Cross Hospital
Contact Laboratory before requesting

Reference range
90 - 700


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 NOTE: See also Renin. Anti-hypertensive drugs may need to be withdrawn prior to test - see protocol.

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


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