9 days
Visual observation of refrigerated samples
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Detects cryofibrinogen in plasma. Used in evaluating cold sensitivity and thrombotic disorders.
Plasma
3 mL
Blue top (sodium citrate) tube, lavender-top (EDTA) tube, or gray-top (sodium fluoride) tube.
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Specimen must be drawn in a prewarmed tube and kept at 37°C. Separate plasma from cells immediately, and transfer the plasma into a clean transport tube. Label transport tube "Prewarmed."
| Temperature | Period |
|---|---|
| Room temperature | 7 days |