Which is the proper order of collection for drawing blood into collection tubes?

The proper order of collection for drawing blood into collection tubes is essential to prevent contamination and ensure accurate test results. Choosing the option that begins with sterile blood cultures is critical because these samples are the most sensitive to contamination. Blood cultures are used to detect bacterial or fungal infections in the bloodstream, and collecting them first minimizes the risk of any contaminants from the skin or other specimen tubes affecting the outcome.

Following the collection of sterile blood cultures, the next step is to collect specimens for coagulation studies. These specimens often require a specific ratio of blood to anticoagulant, which is vital for obtaining reliable results. The order ensures that the coagulation factors remain stable and that additives from other tubes do not interfere with the coagulation tests.

By adhering to this order, healthcare professionals can maintain the integrity of each sample, leading to more accurate diagnostic information. This practice is part of standardized protocols in phlebotomy to streamline processes and enhance patient care.