Digoxin

Specimen Tube Type Transport

Gel green top or red top tube

Container Whole Blood Required

4 ml whole blood in a Red Top Tube

Critical Value

All ages and sex results >3.0 ng/mL

Summary Test Name

Digoxin

Specimen Preparation Outreach

Spin right away, separate plasma into plastic 12 x 75 pour-off tube. Cap with plastic stopper. Refrigerate until courier pickup.

Specimen Stability

24 hours refrigerated, if spun and plasma removed from gel; 6 hours on the gel

Minimum Volume

1 full GREEN microtainer or 1 mL in a pediatric GREEN top tube.

Specimen Transport

Refrigerate

Specimen Preparation In House

Spin and refrigerate until analysis. Separate serum from cells if testing is delayed.

Stat Availability

24 hours a day, seven days a week

Test Turnaround Time Routines And Stats

R 4 hours S 1 hour

Patient Preparation

Test not available if patient has been given Digibind. Digibind interferes with the test methodology.

Reference Value

Therapeutic range 0.8 - 2.0 ng/mL

Additional Test Information

TROUGH: Collect immediately before administering the next dose. At a minimum, the sample can be drawn 6-8 hours after the last dose.