Which statement describes the correct approach to mixing a blood collection tube with anticoagulant after collection?

Which statement describes the correct approach to mixing a blood collection tube with anticoagulant after collection?

• A. Inverts 2-3 times.
• B. Shake vigorously.
• C. Gently invert 8–10 times.
• D. Do not mix.

Answer: (C)

Mixing the blood with the anticoagulant right after collection ensures the additive spreads evenly so clotting is prevented and the test results stay accurate. The best approach is to gently invert the tube 8–10 times. This gentle motion fully disperses the anticoagulant without creating foam or causing cell damage, which can happen with vigorous shaking. Inadequate mixing (too few inversions) leaves some blood not in contact with the additive, risking clot formation and compromised samples, while vigorous shaking can harm cells. So, a gentle, eight to ten inversion is the proper technique.

Mixing the blood with the anticoagulant right after collection ensures the additive spreads evenly so clotting is prevented and the test results stay accurate. The best approach is to gently invert the tube 8–10 times. This gentle motion fully disperses the anticoagulant without creating foam or causing cell damage, which can happen with vigorous shaking. Inadequate mixing (too few inversions) leaves some blood not in contact with the additive, risking clot formation and compromised samples, while vigorous shaking can harm cells. So, a gentle, eight to ten inversion is the proper technique.