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Digoxin, Serum
MessageLabCorp
Test Code
7385
Alias/See Also
Lanoxin®
CPT Codes
80162
Preferred Specimen
"Serum
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Minimum Volume
"0.3 mL (Note: This volume does not allow for repeat testing.)
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Instructions
"Be sure patient is not on digitoxin
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Transport Container
"Red-top tube or gel-barrier tube
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Transport Temperature
"Refrigerate
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Specimen Stability
"Temperature Period
Room temperature 14 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw cycles Stable x3
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Room temperature 14 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw cycles Stable x3
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Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Citrate plasma specimen; improper labeling
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Methodology
"Electrochemiluminescence immunoassay (ECLIA) "
Limitations
"Digoxin should not be confused with digitoxin. The elimination half-life in normal subjects is 37 hours. Patients with renal failure may have an endogenous digoxin-like material in their serum which makes digoxin measurements unreliable.
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