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Aldosterone, Serum

Mnemonic:    [Aldoster]
Name:    Aldosterone, Serum
Specimen:    Separate from cells ASAP or within 2 hours of collection. 1 mL Serum from a PLASTIC Red SST; glass tubes are unacceptable Heaprinized plasma is now acceptable.

EDTA plasma is unacceptable.
Minimum Spec:    0.5 mL
Transport Temp:    FREEZE
Spec Stability:    Stable 5 days refrigerated.
Ref Lab/Code:    ARUP 0070015
  Method:    Radioimmunoassay
Note:    Generally, "upright" samples should be collected; the patient should be upright (seated or standing) for at least 2 hours (out of bed for at least 2 hours).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.

(Normal levels of aldosterone are dependent on the sodium intake and whether the patient is upright or supine.)