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Worcestershire Acute Hospitals NHS Trust
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Test
Aldosterone
CategoryClinical Biochemistry
Code
ALD
Test information
The Endocrine Society Clinical Practice Guidelines (2008) recommends the following patient groups be investigated for primary hyperladosteronism (PA). 
Patients with (i) moderate, severe or drug resistant hypertension (ii) hypertension and hypokalemia  (iii) hypertension with adrenal incidentaloma (iv) hypertension and a family history of early onset hypertension or cerebrovascular accident at an early age (<40 years). 
The only form of secondary hyperaldosteronism in which the assay of aldosterone is of value is Bartter's syndrome (not in nephrotic syndrome, cirrhosis etc). 
Measurement of PRA may assist management. IF RENIN ALSO REQUESTED BOOK IN AS CONN.
Pre-analytical
Include blood pressure and drugs.
Reference range
After overnight recumbency: 
100 - 450 pmol/L. 
Random sample on upright patient: 
100 - 800 pmol/L
Special requirements
Plasma (or serum)
Tube type
Lithium heparin (EDTA acceptable) STT if only for aldosterone
Gold and green tubes
Minimum volume
700 uL
TAT Inpatient
4 weeks
TAT GP/Outpatient
4 weeks
Referral lab
Dept of Clinical Biochemistry, Charing Cross Hospital
Page last updated: 16 July 2019