What colors are used to identify PST blood collection tubes?

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Multiple Choice

What colors are used to identify PST blood collection tubes?

Explanation:
PST tubes are identified by a light green cap because they contain lithium heparin with a gel for plasma separation. The pale green shade distinguishes these tubes from other green-top tubes that may contain different heparin formulations or no gel. The gel provides a barrier between plasma and cells after centrifugation, which is why PST tubes are used for plasma testing. Blue tops, in contrast, contain citrate and are used for coagulation studies, not plasma separation.

PST tubes are identified by a light green cap because they contain lithium heparin with a gel for plasma separation. The pale green shade distinguishes these tubes from other green-top tubes that may contain different heparin formulations or no gel. The gel provides a barrier between plasma and cells after centrifugation, which is why PST tubes are used for plasma testing. Blue tops, in contrast, contain citrate and are used for coagulation studies, not plasma separation.

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