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What is the correct specimen to draw for the CAP /CIP ratio?

April 26, 2017cap CIP draw ratio specimen

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What is the correct specimen to draw for the CAP /CIP ratio?

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SCL requires that an EDTA (lavender top tube) blood sample with a minimum of 2 ml of blood be drawn and centrifuged within 60 minutes and frozen, in order to derive EDTA plasma for performing both the unique “Total Intact PTH” and “CAP Assay” tests in order to calculate the CAP /CIP ratio.