Order of Draw in Pathology Laboratory|| Blood Collection - Phlebotomy

Order of Draw in Pathology Laboratory – This the video on Order of Draw and additive carry over.
The order of draw is an unique sequence of tube collection that decreases the threat of specimen contamination by microorganisms (e.g., blood cultures) and additive carry-over, which impacts some chemistry tests.

Additive carry-over can take place when blood in an additive tube touches the needle throughout venipuncture or during transfer from a syringe.
EDTA carry over causes more problem than any other ingredients
Heparin causes least

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