Lavender Top Tube

(redirected from Purple Top Tube)
A phlebotomy tube with EDTA anticoagulant, used in
(1) Chemistry for carcinoembryonic antigen (CEA), lead, rennin
(2) Haematology to measure parameters requiring separated cells—e.g., white cells, red cells—haematocrit, haemoglobin, MCV, MCH, MCHC, differential counts, sedimentation rate, glucose-6-phosphate dehydrogenase, sickle cell preparation, haemoglobin electrophoresis, platelet counts, reticulocyte counts
References in periodicals archive ?
The phlebotomist took out all the blood-collecting tools: tourniquet, alcohol pad, butterfly needle set, gauze, and band-aid, as well as, a red and purple top tube. The phlebotomist then tied the tourniquet around the patient's left arm and searched the antecubital area for a good vein.
The phlebotomist used a blood collection kit to draw the blood and drew the purple top tube before the green top tube.
This "smart sorter" helps eliminate duplicate testing if the laboratory receives two purple top tubes on the same patient because an A1c was ordered and two tubes were inadvertently drawn.