| A | B |
| Marble green tube additive | Lithium heparin and gel. |
| Marble green tests | Any STAT tests |
| What does STAT mean? | Short Turn Around Time (from Latin "Statim") |
| Marble green department | Chemistry |
| Marble green specimen type | Plasma |
| Green tube additive | Sodium heparin (Na Hep) |
| Green tube tests | Ammonia |
| Green tube department | Chemistry |
| Green tube specimen type | Plasma |
| Gray tube additive(s) | Sodium fluoride (NaF) and Potassium Oxalate (K+ Ox) |
| Gray tube tests | Glucose Tolerance Test, ETOH*, lead (Pb) |
| Green tube rules | On ice |
| Gray tube department | Chemistry |
| Gray tube specimen type | Plasma |
| Light blue tube additive | Sodium citrate (Na Cit.) |
| What is an antiglycolytic agent? | NaF (gray tube) It inhibits glucose consumption. |
| Light blue tube tests | APTT, PTT, TT, PT/INR, |
| Light blue tube department | Coagulation (COAG) |
| Light blue tube specimen type | Plasma |
| Light blue tube rules | Draw a red top first. Fill light blue tube full. |
| Dark blue tube additives (red stripe) | None |
| Dark blue tube tests (red stripe) | Trace elements (lead (Pb), copper (Cu), Zinc (Zn)) |
| Dark blue tube department | Chemistry |
| Dark blue tube specimen type (red stripe) | Serum |
| Dark blue tube additive (lavender stripe) | EDTA |
| Dark blue tube test (lavender stripe) | Trace elements (lead (Pb), copper (Cu), Zinc (Zn)) |
| Dark blue tube specimen type (lavender stripe) | Plasma |
| Dark blue tube department (lavender stripe) | Chemistry |
| Dark blue tube additive (green stripe) | Sodium heparin (Na Hep) |
| Dark blue tube tests (green stripe) | Trace elements (lead (Pb), copper (Cu), Zinc (Zn)) |
| Dark blue tube department (green stripe) | Chemistry |
| Dark blue tube specimen type | Plasma |
| Mint tube additive | Lithium heparin + gel |
| Mint tube tests | STAT chemistry |
| Mint tube department | Chemistry |
| Mint tube specimen type | Plasma |
| Red tube additive | None |
| Red tube tests | Special serum, ETOH*, HIV** |
| Red tube departments | Chemistry, serology, toxicology |
| Red tube specimen type | Serum |
| Gold tube additive | Clot activator and thixotropic gel |
| Gold tube tests | Any chemistry (C7, PSA, lipids, FSH, TSH, LH) |
| Gold tube specimen type | Serum |
| Marble red tube additive | Clot activator and thixotropic gel |
| Marble red tube tests | Any chemistry (C7, PSA, lipids, FSH, TSH, LH) |
| Marble red tube department | Chemistry |
| Marble red tube specimen type | Serum |
| Twin of marble red top tube | Gold top tube |
| Twin of gold top tube | Marble red top tube |
| Twin of mint tube | Marble green tube |
| Twin of marble green tube | Mint tube |