Digitoxin Quantitative, Serum or Plasma
Also known as: DIGIT SP
Use
Digitoxin Quantitative, Serum or Plasma test is used to optimize drug therapy and monitor patient adherence. It provides a quantitative measure of digitoxin levels in serum or plasma, helping clinicians assess whether a patient is maintaining therapeutic levels of the drug. Monitoring is essential as digitoxin has a narrow therapeutic range, and deviations can lead to suboptimal therapy or toxicity.
Special Instructions
This test does not measure digoxin (Lanoxin, Digitek); for digoxin testing, the Digoxin, Serum or Plasma test should be ordered. The test is performed by a non-ARUP laboratory and requires that specimens be separated from cells as soon as possible or within 2 hours of collection. Separate specimens must be submitted when multiple tests are ordered, as the test is not performed at ARUP.
Limitations
This test is specific to digitoxin and does not provide measurements of digoxin levels; therefore, it cannot be used for digoxin monitoring. Results may be affected by improper specimen handling or collection beyond the specified time frame. Separators tubes are an unacceptable condition for specimens, and results are dependent upon proper sampling and storage conditions.
New York Approved
Methodology
Immunoassay
Biomarkers
LOINC Codes
- 3559-2
Result Turnaround Time
5-8 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.4 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Separate from cells ASAP or within 2 hours of collection. Transfer to an ARUP Standard Transport Tube.
Storage Instructions
Refrigerated. Also acceptable: Frozen.
Causes for Rejection
Separator tubes.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 1 week |
| Frozen | 3 months |