ARUP's Laboratory Test Directory

0070073: Aldosterone/Renin Activity Ratio

Test Mnemonic: A/RA
Methodology: Radioimmunoassay

Performed: Sun-Sat

Reported: 1-3 days

Specimen Required:  
Collect: One 6 mL plastic SST and one 5 mL lavender (EDTA) or pink (K2EDTA).

Transport: 1 mL serum and 1 mL plasma  (Min: 0.6 mL serum and 0.6 mL plasma), frozen.  Submit specimens in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 0.5 mL serum and 0.6 mL plasma (EDTA), frozen.

Remarks: CRITICAL FROZEN.  Separate specimens must be submitted when additional tests are ordered.  Do not refrigerate.  Do not collect in refrigerated tubes.  Separate plasma from cells ASAP and freeze.

Unacceptable Conditions: Refrigerated plasma.

Stability: After separation from cells: Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 1 month

Reference Interval:
 
Test Number Components Reference Interval
0070015Aldosterone, Serum  
 
Age Posture Unspecified Supine Upright
0-6 days 5.0-102.0 ng/dL   
1-3 weeks 6.0-179.0 ng/dL   
1-11 months 7.0-99.0 ng/dL   
1-2 years 7.0-93.0 ng/dL   
3-10 years 4.0-44.0 ng/dL   
11-14 years 4.0-31.0 ng/dL   
15 years and older 31.0 ng/dL or less 16.0 ng/dL or less 4.0-31.0 ng/dL
0070105Renin Activity Adult, normal sodium diet:
  Supine: 0.2-1.6 ng/mL/hr
  Upright: 0.5-4.0 ng/mL/hr
Newborn (1-7 days): 2.0-35.0 ng/mL/hr
Cord blood: 4.0-32.0 ng/mL/hr
Children, normal sodium diet, supine:
  1-12 months: 2.4-37.0 ng/mL/hr
  13 months-3 years: 1.7-11.2 ng/mL/hr
  4-5 years: 1.0-6.5 ng/mL/hr
  6-10 years: 0.5-5.9 ng/mL/hr
  11-15 years: 0.5-3.3 ng/mL/hr
 Aldosterone/Renin Activity Calculation < 25
An Aldosterone/Renin Activity Ratio of greater than 25 is suggestive of hyperaldosteronism.
 

CPT Code(s):
82088 Aldosterone, 84244 Renin activity

 

 

 
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