0070073
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Aldosterone/Renin Activity Ratio

A/RA
Example Reports
Abnormal
Normal

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Additional Technical Information

Ordering Recommendation

Screen and diagnose hyperaldosteronism.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Collect midmorning after patient has been sitting, standing, or walking for at least 2 hours, and seated for 5-15 minutes. Refer to the Additional Technical Information for specific patient preparation recommendations.

Collect

Serum Separator Tube (SST) AND Lavender (K2EDTA) or Pink (K2EDTA). Do not collect in refrigerated tubes.

Specimen Preparation

Separate from cells ASAP or within 2 hours of collection.
Serum: Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
AND 
Plasma: Transfer 2 mL EDTA plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 1.2 mL)

Storage/Transport Temperature

Both specimens should be collected and submitted together for testing.
Serum: Frozen.
Plasma: CRITICAL FROZEN.  Separate specimens must be submitted when additional tests are ordered.

Unacceptable Conditions

Plasma collected in citrate, heparin, or oxalate. Hemolyzed specimens.

Remarks
Stability

Serum: Ambient: 8 hours; Refrigerated: 5 days; Frozen: 1 month
Plasma: Ambient: 6 hours; Refrigerated: Unacceptable; Frozen: 1 month

Methodology

Quantitative Chemiluminescent Immunoassay (CLIA)/Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)

Performed

Sun-Sat

Reported

1-5 days

Reference Interval

Test Number
 Components
 Reference Interval
  Aldosterone
Age
 Posture Unspecified (ng/dL)
 Supine (ng/dL)
 Upright (ng/dL)
0-6 days 5.0-102.0
1-3 weeks 6.0-179.0
1-11 months 7.0-99.0
1-2 years 7.0-93.0
3-10 years 4.0-44.0
11-14 years 4.0-31.0
15 years and older 31.0 or less 16.0 or less 4.0-31.0

  Aldosterone/Renin Activity Calculation Less than or equal to 25
  Renin Activity
Age
 Supine (ng/mL/hr)
 Upright (ng/mL/hr)
Newborn (1-7 days) 2.0-35.0 Not Available
1-12 months 2.4-37.0 Not Available
13 months-3 years 1.7-11.2 Not Available
4-5 years 1.0-6.5 Less than or equal to 15
6-10 years 0.5-5.9 Less than or equal to 17
11-15 years 0.5-3.3 Less than or equal to 16
Adult 0.2-1.6 0.5-4.0

Interpretive Data

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)

Note

Refer to the Additional Technical Information for Endocrine Society recommendations for patient preparation, specimen collection, medications for hypertension control during confirmatory testing for primary aldosteronism, and factors that may lead to false-positive or false-negative ARR results.

Hotline History

N/A

CPT Codes

82088; 84244

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Components

Component Test Code* Component Chart Name LOINC
0070015 Aldosterone 1763-2
0070074 Aldosterone/Renin Activity Calculation 30894-0
0070105 Renin Activity 2915-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Aldosterone and Plasma Renin Activity
  • Aldosterone serum
  • Aldosterone/Renin Activity
  • ARR
  • ARR-P
  • PRA
  • Renin Activity
Aldosterone/Renin Activity Ratio