Order of Draw,phlebotomy,blood collection/pre analytical variables in phlebotomy ,phlebotomy tubes

Order of draw that is how do we collect the blood in the vacutainers?
First the blood is collected in blood culture bottles—then in citrate tubes—–then in plain(red) or gel tubes—-then in Heparin (green) —–then in EDTA (purple)—–lastly in fluoride (grey) tubes.
Order of draw is to be maintained always.
The glass tubes contain the silica which prevent RBCs from adhering to the walls of the tube.

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