The sequence in which blood collection tubes are filled and drawn during venipuncture is a standardized procedure vital for accurate laboratory test results. Adherence to this established methodology minimizes the risk of cross-contamination between additives in different tubes. For instance, drawing a tube containing EDTA before a tube for coagulation studies can falsely elevate potassium levels and interfere with clotting time.
Strict adherence to this protocol is paramount in clinical settings, preventing inaccurate diagnostic information. This practice reduces the need for redraws, minimizing patient discomfort and lowering healthcare costs associated with repeated phlebotomy procedures. Implementing this technique contributes to efficient laboratory workflow and promotes patient safety by delivering dependable test results upon which clinical decisions are based.
The following sections will provide a detailed overview of the recommended blood draw sequence, factors that can influence it, and techniques for maintaining adherence to the protocol in everyday practice.
