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Phlebotomy Quick Reference Card
Order of draw, tourniquet rules, PPE sequence, and every other number you need for the NHA CPT exam — on one printable page.
Order of Draw (CLSI)
| 1. Blood culture tubes | Sterile — always drawn first |
| 2. Light blue (citrate) | Coagulation — invert 3-4× |
| 3. Red / Gold (SST) | Serum chemistry — invert 5× |
| 4. Green (heparin) | Plasma chemistry — invert 8-10× |
| 5. Lavender (EDTA) | CBC, blood bank — invert 8-10× |
| 6. Gray (sodium fluoride) | Glucose, lactate — invert 8-10× |
Tourniquet Rules
| Max application time | 1 minute |
| If exceeded | Release, wait 2 min, reapply |
| Release point | As soon as blood flow is established |
| Risk if left too long | Hemoconcentration — falsely elevated results |
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