Blood Collection Tube Top Colors
Click on the stopper to get additional information
Light Blue top Red top tube - Serology and Immunohematology
Red top tube - Chemistry Light Green top or Green top Lavender top Pink top tube (Blood Bank EDTA) Gray top Yellow top tube (ACD solution A) or (ACD solution B) Royal Blue top; serum, no additive or sodium heparin White top
Order of the Draw
To prevent contamination of tubes with additives from other tubes it is important to draw the tubes in a SPECIFIC order called "the order of the draw". For example, if the additive in the purple stopper tube contaminates the green stopper tube this would cause a falseley decreased calcium and increased potassium. Please, JUST DO IT. The sequence of collection of evacuated tubes in a multi-draw should be in this order:
http://www.pathology.med.umich.edu/bloodbank/faqs.html - has the following picture. Visit their website as it has some other nice pictures and explanations.