|Lavender top tube 3 mL (EDTA)
||Light Blue top tube 2.7 mL (Na Citrate)
Full draw; 3.0 mL lavender top; (or fingerstick)
24 hrs/day, 7 days a week, including holidays.
Routine turnaround time is approximately 1 hour.
Critical value: <10 k/mm3 and >1000 k/mm3
For patients who repeatedly have platelet clumps which preclude
determination of an accurate platelet count, it is now possible to
order a platelet count from a citrate tube. In many cases the EDTA in
a lavender top tube causes the platelet clumping which does not occur
in a blue top (citrate tube). Use order code PLTB to order the
Platelet Count, Blue Top (Citrate) Tube. The Epic order code is
LAB7882. This test is available 24 hours a day, 7 days a week. This
test cannot be done on a citrate tube drawn for coagulation
This test is also performed in the
Iowa River Landing (IRL) clinical laboratory (for specimens drawn at