How do you prevent specimen contamination?

For “How do you prevent specimen contamination”, the practical answer comes down to: Aseptic technique and order of draw; Separation of additives and additives timing; Temperature and light protection when required. Your visit still depends on address, window, and what your order or kit requires—complete paperwork speeds routing.

Common situations: Patients with difficult veins; Specialty assays sensitive to hemolysis. On site, success means correct tubes, labeling, and any spin or temperature steps your lab or IFU specifies.

If you’re in one of these buckets—Patients with difficult veins; Specialty assays sensitive to hemolysis—book with orders, ID expectations, and special handling notes spelled out. Related questions below go deeper without repeating this page.

Aseptic technique and order of draw interacts with separation of additives and additives timing—adjust one and the visit plan may change. Mobile collection is professional venipuncture where you choose, with handling aligned to your lab—not a substitute for your clinician’s orders.