What must be observed if multiple blood tests are requested?

When multiple blood tests are requested, it is crucial to observe the proper order of draw. This is vital because different tests may require different additives in the collection tubes, and drawing in the correct sequence helps prevent cross-contamination of additives. If tubes are not drawn in the correct order, it can lead to inaccurate test results, as some additives may interfere with the subsequent samples.

The correct order of draw minimizes the risk of contamination and ensures that each sample is processed correctly for its intended test, which is essential for accurate diagnosis and patient care. Therefore, adhering to the proper order of draw is a fundamental practice for any phlebotomist conducting multiple tests on a patient.