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In which order should a PCT draw specimen tubes for a chemistry panel and coagulation studies?

Red, Light Blue

Light Blue, Red

The correct order for drawing specimen tubes for a chemistry panel and coagulation studies is Light Blue followed by Red. This order is important for several reasons related to the nature of the tests being conducted.

The Light Blue tube is specifically designed for coagulation studies and contains sodium citrate as an anticoagulant. Drawing this tube first ensures that any potential contaminants from other tubes do not interfere with the coagulation tests, which require precise ratios of blood to anticoagulant for accurate results.

Following the Light Blue tube with the Red tube, which is typically used for serum tests, allows for further tests without the risk of impacting the coagulation results, as this tube usually contains no additives that could interfere with subsequent chemistry analyses. Furthermore, the order of draw minimizes the risk of cross-contamination and guarantees that the samples are handled according to best practices within laboratory standards.

This systematic approach to specimen collection is crucial for maintaining the integrity of test results and ensuring effective clinical decision-making.

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Green, Lavender

Yellow, Pink

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