91294 Aldosterone/Renin Activity Ratio

Specimen:

Collect:

One 7.5 mL SST
One 4 mL Lavender (EDTA)

Also Acceptable
One 4 mL Green Top (Li Heparin)
One 4 mL Green Top (Na Heparin)

Submit:

1 mL (Min:0.5 mL) Serum. Submit Frozen. Submit in a Standard Transport Tube.
2 mL (Min:1.5 mL) Plasma. Submit Frozen. Submit in a Standard Transport Tube.

Special Handling:

Critical Frozen
Separate aliquot required for each frozen test ordered
Separate from cells ASAP
Both SST and EDTA samples are required for this test. If supine: Draw between 8-10am, patient should be supine for at least 2 hours.
If upright: Draw before noon and patient should be upright at least 2 hours.
Patients should be on normal sodium diet (100-200 mEq/day) and receive no medications known to affect aldosterone-renin system.
Clearly mark sample type on each tube

Rejection Criteria:

Hemolyzed specimens
Specimen not submitted frozen

Stability:

Ambient: 4 Hour(s); Refrigerated: Unacceptable; Frozen: 1 Month(s); Incubated: Unacceptable

Methodology:

Quant Radioimmunoassay/Calculation

Performed:

Sun-Sat

Reported:

3-6 Day(s)

CPT Codes:

82088

84244

Interpretive Data:

Please see report for interpretive data.

Components:

91012 - ALDOSTERONE	91196 - RENIN ACTIVITY
93584 - RATIO