Final answer:
The correct order of draw for venipuncture using vacuum tubes is blood cultures, coagulation tubes, and serum tubes to avoid cross-contamination and maintain sample integrity.
Step-by-step explanation:
The correct order of draw for the vacuum tube method of venipuncture is crucial to prevent cross-contamination between different types of blood tests and to maintain the integrity of the samples. The correct order is blood cultures, coagulation tubes, and serum tubes. This sequence is designed to minimize the risk of bacterial contamination in the blood cultures, followed by the collection of coagulation samples where it's vital to prevent any interference from other additives. Finally, serum tubes, which contain a clot activator, are drawn after these sensitive tests.