What is the correct order of draw for blood collection?

The correct order of draw for blood collection is based on the type of tests being performed and the additives present in the collection tubes, which can affect the results if not drawn in the correct sequence. The answer provided outlines the following order: blood culture, blue tube, red tube, green tube, and lavender tube.

Starting with blood cultures is crucial as these tubes are designed specifically to detect bacteria or fungi in the blood. It's important to collect these first to avoid contamination from other blood draw tubes that may contain additives or preservatives that could interfere with the culture results.

The blue tube is typically used for coagulation studies and contains sodium citrate, which is an anticoagulant. Drawing this tube after the blood culture minimizes the risk of cross-contamination, which could yield false results in the coagulation tests.

Next is the red tube, which usually does not contain any additives or has a clot activator. It allows for serum-based tests once the blood has clotted. Following the red tube, the green tube is used for plasma tests, containing heparin as an anticoagulant. Lastly, the lavender tube is used for hematology tests and contains EDTA, which is also an anticoagulant.

This order is essential as it maintains the integrity