Which color tube top is used for serum collection with no additive?

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Multiple Choice

Which color tube top is used for serum collection with no additive?

Explanation:
Serum is obtained after the blood clots, so you need a tube that won’t interfere with that clotting process. A red-top tube has no additives, allowing the blood to clot normally and then yielding serum after centrifugation. Other colored tubes contain anticoagulants or additives (green with heparin, lavender with EDTA, yellow with SPS or ACD), which prevent clotting or alter the sample, making them unsuitable for serum collection. Hence, the red top is the best choice for serum collection with no additive.

Serum is obtained after the blood clots, so you need a tube that won’t interfere with that clotting process. A red-top tube has no additives, allowing the blood to clot normally and then yielding serum after centrifugation. Other colored tubes contain anticoagulants or additives (green with heparin, lavender with EDTA, yellow with SPS or ACD), which prevent clotting or alter the sample, making them unsuitable for serum collection. Hence, the red top is the best choice for serum collection with no additive.

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