Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for
testing to when the result is released to the ordering provider. In some cases, additional time should be
allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Serum (preferred) or plasma (lithium heparin only). EDTA plasma causes decreased results.
0.7 mL (Note: This volume does not allow for repeat testing.)
Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma.
Separate serum or plasma from cells within 45 minutes of collection.
Maintain specimen at room temperature.
Severe hemolysis; improper labeling; improper collection; EDTA or oxalate plasma specimens
Aid in the evaluation of a number of conditions
involving red cell production and destruction, iron metabolism, or iron
0 to 30 d
1 m to 1 y
2 to 12 y
13 to 17 y
18 to 60 y