Which color tube top is used for plasma collection with heparin anticoagulant?

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Multiple Choice

Which color tube top is used for plasma collection with heparin anticoagulant?

Explanation:
Green-topped tubes contain heparin, an anticoagulant that prevents blood from clotting. This allows you to collect plasma and then separate it by centrifugation for plasma chemistry tests. Other tube colors use different additives (for example, light blue uses citrate for coagulation studies, red is no additive for serum, gray has fluoride/oxalate for glucose testing), so the green top is the one designated for plasma collection with heparin.

Green-topped tubes contain heparin, an anticoagulant that prevents blood from clotting. This allows you to collect plasma and then separate it by centrifugation for plasma chemistry tests. Other tube colors use different additives (for example, light blue uses citrate for coagulation studies, red is no additive for serum, gray has fluoride/oxalate for glucose testing), so the green top is the one designated for plasma collection with heparin.

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