Test Tubes, Additives and Tests
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| What are YELLOW tubes used for? | Blood culture and sterile specimens
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| What are BLUE tubes used for? | Coagulation tests (PT, PTT, fibrinogen)
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| What are RED tubes used for? | Serum determinations in chemistry testing and blood bank testing.
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| What are GREEN tubes used for? | Routine chemistry testing
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| What are LAVENDER tubes used for? | Hematology testing (CBC, reticulocyte count, erythrocyte sedimentation).
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| What are GRAY tubes used for? | Glucose tolerance and lactic acid measurement.
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| What are ROYAL BLUE and TAN tubes used for? | Used to collect samples for nutritional studies, therapeutic drug
monitoring and toxicology. Also used for testing aluminum,
copper, arsenic, calcium, etc. Tan topped is used for lead testing.
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| What is the additive in Yellow stopper tubes? | Sodium Polyanetholesulfonate
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| What is the additive in Blue stopper tubes? | Sodium Citrate
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| Which additive prevents coagulation by binding calcium? | Sodium Citrate
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| Which color tube stopper does not require an additive? | Red
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| What additive *can* (not required) be added to RED stopper tubes? | Thixotropic gel
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| What is the additive in GREEN stopper tubes? | Sodium heparin and lithium heparin - natural anticoagulants that inhibits thrombin.
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| What is the additive in LAVENDER stopper tubes? | Ethylenediaminetetraacetic Acid (EDTA)
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| What does the additive Ethylenediaminetetraacetic Acid (EDTA) do? | Binds the calcium needed for clot formation.
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| What is the additive in GRAY stopper tubes? | Sodium fluoride and Potassium Oxalate
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| What is the additive in TAN stopper tubes? | EDTA - Ethylenediaminetetraacetic Acid
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| What is the correct order of draw when performing a venipuncture? | 1. Blood Cultures
2. Light Blue top-tubes
3. Red or Speckled tubes
4. Green top tubes
5. Lavender top tubes
6. Gray top tubes
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| What color tube is used for DNA testing? | Yellow
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| Tests done in the blood bank require what color tube? | Red or Lavender or Pink
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| What is the CLSI Order of Draw? | 1. Yellow - Sterile
2. Light Blue top-Coagulation
3. Red - Serum
4. Red Tiger Top - SST
5. Light Green - Lithium Heparin
6. Dark Green - Sodium Heparin
7. Lavender - EDTA
8. Gray - Glycolytic inhibitor
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| A urine C & S is typically ordered to detect what? | U.T.I.
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| What hormone is detected in a positive urine pregnancy test? | HCG
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| Which test might require 'chain of custody?' | Drug Test
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| Which color tube is used for lead testing? | Tan
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