What is the consequence of not following the proper order of draw?

When the proper order of draw is not followed during the collection of blood samples, the most significant consequence is that test results may be inaccurate. This is primarily because different types of additives within the collection tubes can contaminate samples if the order is not adhered to. For example, if a tube containing an anticoagulant is drawn before a serum tube, it can introduce anticoagulants into the serum sample, altering the composition and leading to erroneous test results.

Inaccurate results can have serious implications for patient diagnosis and treatment decisions. For instance, a falsely elevated or decreased lab value could result in inappropriate medical interventions or delays in necessary care. It is crucial to maintain the order of draw to prevent this kind of contamination and ensure the reliability and validity of laboratory results.