What is a gold top tube blood test?
Gold Top (Serum Separator, “SST”) Contains separating gel and clot activator. 6.0 mL. Most chemistry, endocrine and serology tests, including Hepatitis and HIV.
What is the gold test tube used for?
QuantiFERON-TB Gold (QFT) is a simple blood test that aids in the detection of Mycobacterium tuberculosis, the bacteria which causes tuberculosis (TB). QFT is an interferon-gamma (IFN-γ) release assay, commonly known as an IGRA, and is a modern alternative to the tuberculin skin test (TST, PPD or Mantoux).
What additive is in a gold top tube?
Blood Collection Tubes
| Tube cap color | Additive |
|---|---|
| Light-blue | 3.2% Sodium citrate |
| Red or gold (mottled or “tiger” top used with some tubes) | Serum tube with or without clot activator or gel |
| Green | Sodium or lithium heparin with or without gel |
| Lavender or pink | Potassium EDTA |
Is gold top tube same as Tiger?
SSTs are sometimes called “marble-top tubes”, “tiger-tops”, or “gold-topped tubes”, referring to the stoppers which are either gold, red with a gold ring on top, or marbled red and grey. Marble-top tubes are also referred to as “tiger-tops” in some clinics.
What if TB gold test is positive?
A positive response to the QuantiFERON Tb Gold Test indicates towards the infection with the Mycobacterium tuberculosis. Although it does not mean that the person has active TB, rather it simply means that the person has been exposed to the mycobacterium tuberculosis bacterium.
Is TB gold test reliable?
The overall sensitivity for active TB was 87.5%, ranging from 62.5% in children 25–36 months old to 100% in children older than 49 months. The overall specificity for active TB was 93.6%. Among the 481 children tested for LTBI screening, 38 scored positive and all but 2 had at least one risk factor for TB infection.
What do the colors mean on blood draw tubes?
Red: Contain NO anticoagulants, used for serum testing. Serum is fluid that is left behind after the cells are removed due to clotting. Gold: Contains a clot activator and special gel to separate serum from the cells. Purple: Contains a clot blocker and are used for complete blood count(CBC).
Is a gold top serum or plasma?
Serum is usually collected in mottled red/gray, gold, or cherry red-top tubes, and red-top tubes are occasionally used. Plasma is obtained from blood that has been mixed with an anticoagulant in the collection tube and has, therefore, not clotted.
Is TB gold test accurate?
The specificity of QuantiFERON-TB Gold has consistently shown to be >99% in low risk individuals (12). Specificity is the probability that the test indicates a person does not have the disease (or infection) when that person is disease free.
How do you read TB gold test results?
The QuantiFERON(R) TB Gold (in Tube) assay is intended for use as an aid in diagnosis of TB infection. Negative results suggest that there is not TB infection. In patients with high suspicion of exposure, a negative test should be repeated. A positive test indicates infection with Mycobacterium tuberculosis.
Can TB Gold test false negative?
Results. False negative QFT-GIT results were found in 28.8% (95% CI 0.22–0.36) of patients with EPTB.
What color tube is plasma?
Green top tube with sodium or lithium heparin: used for plasma or whole blood determinations.