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Tubes/ additives
| Order of draw | Tube top color | Additive | tests | department |
|---|---|---|---|---|
| 2 | Lt Blue | Sodium Citrate | Protime, PT & Prothrombin(all same test) APTT - active partial thromboplastin Pt | Coagulation |
| 3 | Plain Red | Nothing | Drug levels | Chemistry |
| 4 | Gold or red/grey | SST - serum separator tube | Comprehensive metabolic panel - Comp or CMP, Basic Metabolic Panel - BMP or Basic, Electrolytes, lipid panel, thyroid studies - TSH or FT4, Cardiac markers | Chemistry |
| 5 | Green | PST - Plasma separator tube - Heparin - Sodium or Lithium - | STAT chemistries - don't have to wait 30 mins to spin | Chemistry |
| 6 | Lavendar | EDTA | CBC w/differential or Parital blood count- PBC (no diff), ESR=Sed rate | Hematology |
| 7 | Gray | Sodium fluoride Potasium oxalate | Glucose determination, FBS, RBS | Chemistry |
| 1 | Yellow | SPS | for blood cultures | Microbiology |