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The Order of Draw Series: Part Three - Serum Tubes

This week, we're examining serum tubes—plain red tops and gold serum separator tubes (SST)—and discovering why these tubes must be drawn before tubes containing EDTA, heparin, or other anticoagulants

Shanise Keith, January 20, 2026


The Order of Draw Series (Deep Dive): Part Two - Sodium Citrate Tubes

This is the second post in our Order of Draw Deep Dive series. Last week, we explored blood culture bottles and why sterility makes them first in the collection sequence. This week, we're examining light blue top tubes and discovering why coagulation tes

Shanise Keith, January 13, 2026


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