Create an account
Lavendar Top Tube Additive
Contains the anticoagulant ethylenediaminetetraacetic acide (EDTA). EDTA inhibits coagulation by binding to the calcium present in the specimen. Tubes must be filled at least 2/3 full and inverted 8x.
Light-Blue Top Tube Additive
Contains the anticoagulant Sodium Citrate, which prevents coagulation by binding to the calcium in the specimen. Sodium Citrate preserves the coagulation factors. Must be completely filled and inverted 3-4x
Light-Blue Top Tests
PT, APTT (or PTT), Fibrinogen Degradation Products (FDP), Thrombin Time (TT), Factor assays, Bleeding Time (BT)
Green Top Tube Additive
Contains anticoagulant Heparin combined with sodium, lithium, or ammoniumion. Heparin works by inhibiting thrombin in the coagulation cascade. It is not used for hematology because heparin interes with the Wright's stained blood smear. Invert 8x
Gray Top Tube Additive
Contains additives and anticoagulants. All gray top tubes contain glucose preservative. Invert 8x
Gray Top Tube Test
Fasting blood sugar (FBS), glucose tolerance test (GTT), blood alcohol levels, Lactic acid measurements
Red/Gray (speckled) Top Tube Additive
Also called tiger top and serum separator tubes (SST). Contain clot activators: glass particles, silica, and celite and thixotropic gel a serum separator. Invert 5x
Red Top Tube Additive
aka plain vacuum tube. Contains NO additive or anticoagulant. No need to invert.
Yellow Top Tube Additive
Contains the anticoagulant sodium polyanetholesulfonate (SPS). Used to collect specimens to be cultured. Must used strict sterile technique Invert 8x
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together