Heart Biomarker Evaluation in Apnea Treatment
4.2.4.3 Priority of Tubes
A total of approximately 40 mL of blood will be drawn from each participant in 5 tubes. Blood collection must be drawn in the following order:
| Draw Order | Tube | Cap Color |
|---|---|---|
| 1 | 10 mL Serum | Red Top |
| 2 | 5 mL Citrate | Blue Top |
| 3 | 10 mL EDTA | Purple Top |
| 4 | 5 mL SCAT-1 | White Top |
| 5 | 8 mL CPT | Red/Green Top |
National Sleep Research Resource
Heart Biomarker Evaluation in Apnea Treatment