🧪Specimen Types & Special Tests
Can mobile phlebotomists collect for coagulation testing?
Yes. Coagulation tests including PT, INR, aPTT, and fibrinogen are collected in blue top (sodium citrate) tubes — a standard draw type for mobile phlebotomists.
Blue top tubes require precise fill volume (to maintain the correct 9:1 blood-to-citrate ratio), gentle inversion, and prompt processing or refrigerated transport. These requirements are well within standard phlebotomy training.
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